918139525 has 12 divisors (see below), whose sum is σ = 1155487552. Its totient is φ = 723547440.

The previous prime is 918139499. The next prime is 918139531. The reversal of 918139525 is 525931819.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-918139525 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272397 + ... + 275746.

Almost surely, 2^918139525 is an apocalyptic number.

It is an amenable number.

918139525 is a deficient number, since it is larger than the sum of its proper divisors (237348027).

918139525 is a wasteful number, since it uses less digits than its factorization.

918139525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548220 (or 548215 counting only the distinct ones).

The product of its digits is 97200, while the sum is 43.

The square root of 918139525 is about 30300.8172332035. The cubic root of 918139525 is about 971.9327761064.

The spelling of 918139525 in words is "nine hundred eighteen million, one hundred thirty-nine thousand, five hundred twenty-five".