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1389351613 = 13652916369
BaseRepresentation
bin101001011001111…
…1101001010111101
310120211022101010011
41102303331022331
510321133222423
6345510343221
746300202536
oct12263751275
93524271104
101389351613
11653286481
1232935ab11
13191ac0a60
14d273d68d
1581e8eb0d
hex52cfd2bd

1389351613 has 8 divisors (see below), whose sum is σ = 1496545400. Its totient is φ = 1282203648.

The previous prime is 1389351589. The next prime is 1389351617. The reversal of 1389351613 is 3161539831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27594009 + 1361757604 = 5253^2 + 36902^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1389351613 - 213 = 1389343421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389351617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76693 + ... + 93061.

It is an arithmetic number, because the mean of its divisors is an integer number (187068175).

Almost surely, 21389351613 is an apocalyptic number.

1389351613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1389351613 is a deficient number, since it is larger than the sum of its proper divisors (107193787).

1389351613 is a wasteful number, since it uses less digits than its factorization.

1389351613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22911.

The product of its digits is 58320, while the sum is 40.

The square root of 1389351613 is about 37274.0072034119. The cubic root of 1389351613 is about 1115.8454748194.

The spelling of 1389351613 in words is "one billion, three hundred eighty-nine million, three hundred fifty-one thousand, six hundred thirteen".

Divisors: 1 13 6529 16369 84877 212797 106873201 1389351613