56172897 has 36 divisors (see below), whose sum is σ = 90592944. Its totient is φ = 33261840.

The previous prime is 56172889. The next prime is 56172917. The reversal of 56172897 is 79827165.

56172897 is a `hidden beast` number, since 5 + 617 + 28 + 9 + 7 = 666.

It is not a de Polignac number, because 56172897 - 2³ = 56172889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56172827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 344538 + ... + 344700.

Almost surely, 2^56172897 is an apocalyptic number.

It is an amenable number.

56172897 is a deficient number, since it is larger than the sum of its proper divisors (34420047).

56172897 is a wasteful number, since it uses less digits than its factorization.

56172897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 236 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 56172897 is about 7494.8580373480. The cubic root of 56172897 is about 382.9795702028.

The spelling of 56172897 in words is "fifty-six million, one hundred seventy-two thousand, eight hundred ninety-seven".