55756897 has 4 divisors (see below), whose sum is σ = 63722176. Its totient is φ = 47791620.

The previous prime is 55756873. The next prime is 55756903. The reversal of 55756897 is 79865755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79865755 = 5 ⋅15973151.

It is a cyclic number.

It is not a de Polignac number, because 55756897 - 2⁷ = 55756769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55756837) 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 3 ways as a sum of consecutive naturals, for example, 3982629 + ... + 3982642.

It is an arithmetic number, because the mean of its divisors is an integer number (15930544).

Almost surely, 2^55756897 is an apocalyptic number.

It is an amenable number.

55756897 is a deficient number, since it is larger than the sum of its proper divisors (7965279).

55756897 is an equidigital number, since it uses as much as digits as its factorization.

55756897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7965278.

The product of its digits is 2646000, while the sum is 52.

The square root of 55756897 is about 7467.0541045315. The cubic root of 55756897 is about 382.0318152828.

The spelling of 55756897 in words is "fifty-five million, seven hundred fifty-six thousand, eight hundred ninety-seven".