56404669 has 2 divisors, whose sum is σ = 56404670. Its totient is φ = 56404668.

The previous prime is 56404661. The next prime is 56404693. The reversal of 56404669 is 96640465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44756100 + 11648569 = 6690^2 + 3413^2 .

It is a cyclic number.

It is not a de Polignac number, because 56404669 - 2³ = 56404661 is a prime.

It is a super-2 number, since 2×56404669² = 6362973369999122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56404661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28202334 + 28202335.

It is an arithmetic number, because the mean of its divisors is an integer number (28202335).

Almost surely, 2^56404669 is an apocalyptic number.

It is an amenable number.

56404669 is a deficient number, since it is larger than the sum of its proper divisors (1).

56404669 is an equidigital number, since it uses as much as digits as its factorization.

56404669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 56404669 is about 7510.3041882470. The cubic root of 56404669 is about 383.5055779596.

The spelling of 56404669 in words is "fifty-six million, four hundred four thousand, six hundred sixty-nine".