55656889 has 2 divisors, whose sum is σ = 55656890. Its totient is φ = 55656888.

The previous prime is 55656857. The next prime is 55656893. The reversal of 55656889 is 98865655.

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., 53071225 + 2585664 = 7285^2 + 1608^2 .

It is a cyclic number.

It is not a de Polignac number, because 55656889 - 2⁵ = 55656857 is a prime.

It is not a weakly prime, because it can be changed into another prime (55656899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27828444 + 27828445.

It is an arithmetic number, because the mean of its divisors is an integer number (27828445).

Almost surely, 2^55656889 is an apocalyptic number.

It is an amenable number.

55656889 is a deficient number, since it is larger than the sum of its proper divisors (1).

55656889 is an equidigital number, since it uses as much as digits as its factorization.

55656889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592000, while the sum is 52.

The square root of 55656889 is about 7460.3544821945. The cubic root of 55656889 is about 381.8032689479.

The spelling of 55656889 in words is "fifty-five million, six hundred fifty-six thousand, eight hundred eighty-nine".