55565969 has 2 divisors, whose sum is σ = 55565970. Its totient is φ = 55565968.

The previous prime is 55565959. The next prime is 55565977. The reversal of 55565969 is 96956555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52635025 + 2930944 = 7255^2 + 1712^2 .

It is a cyclic number.

It is not a de Polignac number, because 55565969 - 2¹² = 55561873 is a prime.

It is a super-2 number, since 2×55565969² = 6175153821817922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55565959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27782984 + 27782985.

It is an arithmetic number, because the mean of its divisors is an integer number (27782985).

Almost surely, 2^55565969 is an apocalyptic number.

It is an amenable number.

55565969 is a deficient number, since it is larger than the sum of its proper divisors (1).

55565969 is an equidigital number, since it uses as much as digits as its factorization.

55565969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1822500, while the sum is 50.

The square root of 55565969 is about 7454.2584473575. The cubic root of 55565969 is about 381.5952535313.

The spelling of 55565969 in words is "fifty-five million, five hundred sixty-five thousand, nine hundred sixty-nine".