56445989 has 2 divisors, whose sum is σ = 56445990. Its totient is φ = 56445988.

The previous prime is 56445953. The next prime is 56445997. The reversal of 56445989 is 98954465.

56445989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49815364 + 6630625 = 7058^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 56445989 - 2⁸ = 56445733 is a prime.

It is a super-2 number, since 2×56445989² = 6372299348376242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56445089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28222994 + 28222995.

It is an arithmetic number, because the mean of its divisors is an integer number (28222995).

Almost surely, 2^56445989 is an apocalyptic number.

It is an amenable number.

56445989 is a deficient number, since it is larger than the sum of its proper divisors (1).

56445989 is an equidigital number, since it uses as much as digits as its factorization.

56445989 is an odious number, because the sum of its binary digits is odd.

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

The square root of 56445989 is about 7513.0545718769. The cubic root of 56445989 is about 383.5992024936.

The spelling of 56445989 in words is "fifty-six million, four hundred forty-five thousand, nine hundred eighty-nine".