55917897 has 8 divisors (see below), whose sum is σ = 85208256. Its totient is φ = 31953072.

The previous prime is 55917889. The next prime is 55917923. The reversal of 55917897 is 79871955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55917897 - 2³ = 55917889 is a prime.

It is a super-2 number, since 2×55917897² = 6253622409805218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55917857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331358 + ... + 1331399.

It is an arithmetic number, because the mean of its divisors is an integer number (10651032).

Almost surely, 2^55917897 is an apocalyptic number.

It is an amenable number.

55917897 is a deficient number, since it is larger than the sum of its proper divisors (29290359).

55917897 is a wasteful number, since it uses less digits than its factorization.

55917897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662767.

The product of its digits is 793800, while the sum is 51.

The square root of 55917897 is about 7477.8270239422. The cubic root of 55917897 is about 382.3991720227.

The spelling of 55917897 in words is "fifty-five million, nine hundred seventeen thousand, eight hundred ninety-seven".