56544989 has 2 divisors, whose sum is σ = 56544990. Its totient is φ = 56544988.

The previous prime is 56544973. The next prime is 56545057. The reversal of 56544989 is 98944565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56100100 + 444889 = 7490^2 + 667^2 .

It is a cyclic number.

It is not a de Polignac number, because 56544989 - 2⁴ = 56544973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56544689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28272494 + 28272495.

It is an arithmetic number, because the mean of its divisors is an integer number (28272495).

Almost surely, 2^56544989 is an apocalyptic number.

It is an amenable number.

56544989 is a deficient number, since it is larger than the sum of its proper divisors (1).

56544989 is an equidigital number, since it uses as much as digits as its factorization.

56544989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 50.

The square root of 56544989 is about 7519.6402174572. The cubic root of 56544989 is about 383.8233349858.

It can be divided in two parts, 565 and 44989, that added together give a palindrome (45554).

The spelling of 56544989 in words is "fifty-six million, five hundred forty-four thousand, nine hundred eighty-nine".