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61389553 = 232669111
BaseRepresentation
bin1110101000101…
…1101011110001
311021111220122011
43222023223301
5111203431203
610031442521
71343542201
oct352135361
9137456564
1061389553
113171a975
1218686441
13c9455a4
148220401
1555c976d
hex3a8baf1

61389553 has 4 divisors (see below), whose sum is σ = 64058688. Its totient is φ = 58720420.

The previous prime is 61389547. The next prime is 61389583. The reversal of 61389553 is 35598316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61389553 - 25 = 61389521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61389583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1334533 + ... + 1334578.

It is an arithmetic number, because the mean of its divisors is an integer number (16014672).

Almost surely, 261389553 is an apocalyptic number.

It is an amenable number.

61389553 is a deficient number, since it is larger than the sum of its proper divisors (2669135).

61389553 is a wasteful number, since it uses less digits than its factorization.

61389553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2669134.

The product of its digits is 97200, while the sum is 40.

The square root of 61389553 is about 7835.1485627268. The cubic root of 61389553 is about 394.4859049250.

The spelling of 61389553 in words is "sixty-one million, three hundred eighty-nine thousand, five hundred fifty-three".

Divisors: 1 23 2669111 61389553