915921875 has 42 divisors (see below), whose sum is σ = 1266311916. Its totient is φ = 657000000.

The previous prime is 915921871. The next prime is 915921889. The reversal of 915921875 is 578129519.

It is a happy number.

It is not a de Polignac number, because 915921875 - 2² = 915921871 is a prime.

It is a super-2 number, since 2×915921875² = 1677825762207031250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (915921871) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 12546839 + ... + 12546911.

Almost surely, 2^915921875 is an apocalyptic number.

915921875 is a deficient number, since it is larger than the sum of its proper divisors (350390041).

915921875 is an frugal number, since it uses more digits than its factorization.

915921875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 89 counting only the distinct ones).

The product of its digits is 226800, while the sum is 47.

The square root of 915921875 is about 30264.2012119930. The cubic root of 915921875 is about 971.1496182945.

The spelling of 915921875 in words is "nine hundred fifteen million, nine hundred twenty-one thousand, eight hundred seventy-five".