656318893 has 2 divisors, whose sum is σ = 656318894. Its totient is φ = 656318892.

The previous prime is 656318863. The next prime is 656318903. The reversal of 656318893 is 398813656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 484132009 + 172186884 = 22003^2 + 13122^2 .

It is a cyclic number.

It is not a de Polignac number, because 656318893 - 2⁹ = 656318381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656318863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328159446 + 328159447.

It is an arithmetic number, because the mean of its divisors is an integer number (328159447).

Almost surely, 2^656318893 is an apocalyptic number.

It is an amenable number.

656318893 is a deficient number, since it is larger than the sum of its proper divisors (1).

656318893 is an equidigital number, since it uses as much as digits as its factorization.

656318893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 656318893 is about 25618.7215332850. The cubic root of 656318893 is about 869.0370695421.

The spelling of 656318893 in words is "six hundred fifty-six million, three hundred eighteen thousand, eight hundred ninety-three".