56656387 has 2 divisors, whose sum is σ = 56656388. Its totient is φ = 56656386.

The previous prime is 56656363. The next prime is 56656399. The reversal of 56656387 is 78365665.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56656387 is a prime.

It is not a weakly prime, because it can be changed into another prime (56656307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28328193 + 28328194.

It is an arithmetic number, because the mean of its divisors is an integer number (28328194).

Almost surely, 2^56656387 is an apocalyptic number.

56656387 is a deficient number, since it is larger than the sum of its proper divisors (1).

56656387 is an equidigital number, since it uses as much as digits as its factorization.

56656387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 46.

The square root of 56656387 is about 7527.0437091862. The cubic root of 56656387 is about 384.0752235263.

It can be divided in two parts, 566 and 56387, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 56656387 in words is "fifty-six million, six hundred fifty-six thousand, three hundred eighty-seven".