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1530139689 = 32132172592
BaseRepresentation
bin101101100110100…
…0001010000101001
310221122020011001100
41123031001100221
511113203432224
6411500112013
752626654441
oct13315012051
93848204040
101530139689
117157a6661
12368535609
131b5015a00
1410730b121
158e4eeac9
hex5b341429

1530139689 has 81 divisors (see below), whose sum is σ = 2586179973. Its totient is φ = 871213824.

The previous prime is 1530139687. The next prime is 1530139727. The reversal of 1530139689 is 9869310351.

The square root of 1530139689 is 39117.

It is a perfect power (a square), and thus also a powerful number.

1530139689 is a `hidden beast` number, since 1 + 530 + 1 + 39 + 6 + 89 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13816089 + 1516323600 = 3717^2 + 38940^2 .

It is not a de Polignac number, because 1530139689 - 21 = 1530139687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1530139687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 25934542 + ... + 25934600.

Almost surely, 21530139689 is an apocalyptic number.

1530139689 is the 39117-th square number.

1530139689 is the 19559-th centered octagonal number.

It is an amenable number.

1530139689 is a deficient number, since it is larger than the sum of its proper divisors (1056040284).

1530139689 is a wasteful number, since it uses less digits than its factorization.

1530139689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The cubic root of 1530139689 is about 1152.3304196325.

The spelling of 1530139689 in words is "one billion, five hundred thirty million, one hundred thirty-nine thousand, six hundred eighty-nine".

Divisors: 1 3 9 13 17 39 51 59 117 153 169 177 221 289 507 531 663 767 867 1003 1521 1989 2301 2601 2873 3009 3481 3757 6903 8619 9027 9971 10443 11271 13039 17051 25857 29913 31329 33813 39117 45253 48841 51153 59177 89739 117351 135759 146523 153459 169507 177531 221663 407277 439569 508521 532593 588289 664989 769301 1006009 1525563 1764867 1994967 2307903 2881619 3018027 5294601 6923709 8644857 9054081 10000913 13078117 25934571 30002739 39234351 90008217 117703053 170015521 510046563 1530139689