56596781 has 2 divisors, whose sum is σ = 56596782. Its totient is φ = 56596780.

The previous prime is 56596747. The next prime is 56596807. The reversal of 56596781 is 18769565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55741156 + 855625 = 7466^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 56596781 - 2¹⁸ = 56334637 is a prime.

It is a super-2 number, since 2×56596781² = 6406391239123922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56596711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28298390 + 28298391.

It is an arithmetic number, because the mean of its divisors is an integer number (28298391).

Almost surely, 2^56596781 is an apocalyptic number.

It is an amenable number.

56596781 is a deficient number, since it is larger than the sum of its proper divisors (1).

56596781 is an equidigital number, since it uses as much as digits as its factorization.

56596781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 47.

The square root of 56596781 is about 7523.0832110246. The cubic root of 56596781 is about 383.9404860205.

The spelling of 56596781 in words is "fifty-six million, five hundred ninety-six thousand, seven hundred eighty-one".