56587777 has 2 divisors, whose sum is σ = 56587778. Its totient is φ = 56587776.

The previous prime is 56587753. The next prime is 56587789. The reversal of 56587777 is 77778565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48316401 + 8271376 = 6951^2 + 2876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56587777 is a prime.

It is not a weakly prime, because it can be changed into another prime (56587717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28293888 + 28293889.

It is an arithmetic number, because the mean of its divisors is an integer number (28293889).

Almost surely, 2^56587777 is an apocalyptic number.

It is an amenable number.

56587777 is a deficient number, since it is larger than the sum of its proper divisors (1).

56587777 is an equidigital number, since it uses as much as digits as its factorization.

56587777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2881200, while the sum is 52.

The square root of 56587777 is about 7522.4847623641. The cubic root of 56587777 is about 383.9201245358.

The spelling of 56587777 in words is "fifty-six million, five hundred eighty-seven thousand, seven hundred seventy-seven".