656318863 has 2 divisors, whose sum is σ = 656318864. Its totient is φ = 656318862.

The previous prime is 656318821. The next prime is 656318893. The reversal of 656318863 is 368813656.

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-656318863 is a prime.

It is a super-2 number, since 2×656318863² = 861508899859225538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656318893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328159431 + 328159432.

It is an arithmetic number, because the mean of its divisors is an integer number (328159432).

Almost surely, 2^656318863 is an apocalyptic number.

656318863 is a deficient number, since it is larger than the sum of its proper divisors (1).

656318863 is an equidigital number, since it uses as much as digits as its factorization.

656318863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The square root of 656318863 is about 25618.7209477757. The cubic root of 656318863 is about 869.0370563011.

The spelling of 656318863 in words is "six hundred fifty-six million, three hundred eighteen thousand, eight hundred sixty-three".