69257139 has 12 divisors (see below), whose sum is σ = 107419464. Its totient is φ = 39575424.

The previous prime is 69257119. The next prime is 69257189. The reversal of 69257139 is 93175296.

It is not a de Polignac number, because 69257139 - 2⁷ = 69257011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69257139.

It is not an unprimeable number, because it can be changed into a prime (69257119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235422 + ... + 235715.

It is an arithmetic number, because the mean of its divisors is an integer number (8951622).

Almost surely, 2^69257139 is an apocalyptic number.

69257139 is a deficient number, since it is larger than the sum of its proper divisors (38162325).

69257139 is a wasteful number, since it uses less digits than its factorization.

69257139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471154 (or 471147 counting only the distinct ones).

The product of its digits is 102060, while the sum is 42.

The square root of 69257139 is about 8322.0874184305. The cubic root of 69257139 is about 410.6654650160.

It can be divided in two parts, 69257 and 139, that added together give a palindrome (69396).

The spelling of 69257139 in words is "sixty-nine million, two hundred fifty-seven thousand, one hundred thirty-nine".