56618897 has 2 divisors, whose sum is σ = 56618898. Its totient is φ = 56618896.

The previous prime is 56618869. The next prime is 56618911. The reversal of 56618897 is 79881665.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55294096 + 1324801 = 7436^2 + 1151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56618897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56618867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28309448 + 28309449.

It is an arithmetic number, because the mean of its divisors is an integer number (28309449).

Almost surely, 2^56618897 is an apocalyptic number.

It is an amenable number.

56618897 is a deficient number, since it is larger than the sum of its proper divisors (1).

56618897 is an equidigital number, since it uses as much as digits as its factorization.

56618897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The square root of 56618897 is about 7524.5529435309. The cubic root of 56618897 is about 383.9904895829.

The spelling of 56618897 in words is "fifty-six million, six hundred eighteen thousand, eight hundred ninety-seven".