56573663 has 2 divisors, whose sum is σ = 56573664. Its totient is φ = 56573662.

The previous prime is 56573639. The next prime is 56573669. The reversal of 56573663 is 36637565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56573663 - 2¹² = 56569567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56573663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56573669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28286831 + 28286832.

It is an arithmetic number, because the mean of its divisors is an integer number (28286832).

Almost surely, 2^56573663 is an apocalyptic number.

56573663 is a deficient number, since it is larger than the sum of its proper divisors (1).

56573663 is an equidigital number, since it uses as much as digits as its factorization.

56573663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 41.

The square root of 56573663 is about 7521.5465829841. The cubic root of 56573663 is about 383.8882030415. Note that the first 3 decimals are identical.

The spelling of 56573663 in words is "fifty-six million, five hundred seventy-three thousand, six hundred sixty-three".