56642497 has 2 divisors, whose sum is σ = 56642498. Its totient is φ = 56642496.

The previous prime is 56642459. The next prime is 56642503. The reversal of 56642497 is 79424665.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52186176 + 4456321 = 7224^2 + 2111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56642497 is a prime.

It is not a weakly prime, because it can be changed into another prime (56642297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28321248 + 28321249.

It is an arithmetic number, because the mean of its divisors is an integer number (28321249).

Almost surely, 2^56642497 is an apocalyptic number.

It is an amenable number.

56642497 is a deficient number, since it is larger than the sum of its proper divisors (1).

56642497 is an equidigital number, since it uses as much as digits as its factorization.

56642497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 56642497 is about 7526.1209796282. The cubic root of 56642497 is about 384.0438340622.

The spelling of 56642497 in words is "fifty-six million, six hundred forty-two thousand, four hundred ninety-seven".