56491937 has 2 divisors, whose sum is σ = 56491938. Its totient is φ = 56491936.

The previous prime is 56491871. The next prime is 56491957. The reversal of 56491937 is 73919465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56490256 + 1681 = 7516^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 56491937 - 2¹² = 56487841 is a prime.

It is not a weakly prime, because it can be changed into another prime (56491957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28245968 + 28245969.

It is an arithmetic number, because the mean of its divisors is an integer number (28245969).

Almost surely, 2^56491937 is an apocalyptic number.

It is an amenable number.

56491937 is a deficient number, since it is larger than the sum of its proper divisors (1).

56491937 is an equidigital number, since it uses as much as digits as its factorization.

56491937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 44.

The square root of 56491937 is about 7516.1118272681. Note that the first 3 decimals coincide. The cubic root of 56491937 is about 383.7032597001.

The spelling of 56491937 in words is "fifty-six million, four hundred ninety-one thousand, nine hundred thirty-seven".