56449957 has 2 divisors, whose sum is σ = 56449958. Its totient is φ = 56449956.

The previous prime is 56449937. The next prime is 56450033. The reversal of 56449957 is 75994465.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53714241 + 2735716 = 7329^2 + 1654^2 .

It is a cyclic number.

It is not a de Polignac number, because 56449957 - 2¹⁹ = 55925669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56449957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56449937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28224978 + 28224979.

It is an arithmetic number, because the mean of its divisors is an integer number (28224979).

Almost surely, 2^56449957 is an apocalyptic number.

It is an amenable number.

56449957 is a deficient number, since it is larger than the sum of its proper divisors (1).

56449957 is an equidigital number, since it uses as much as digits as its factorization.

56449957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 49.

The square root of 56449957 is about 7513.3186409203. The cubic root of 56449957 is about 383.6081909443.

The spelling of 56449957 in words is "fifty-six million, four hundred forty-nine thousand, nine hundred fifty-seven".