656093917 has 2 divisors, whose sum is σ = 656093918. Its totient is φ = 656093916.

The previous prime is 656093897. The next prime is 656093927. The reversal of 656093917 is 719390656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 598242681 + 57851236 = 24459^2 + 7606^2 .

It is a cyclic number.

It is not a de Polignac number, because 656093917 - 2²³ = 647705309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656093927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328046958 + 328046959.

It is an arithmetic number, because the mean of its divisors is an integer number (328046959).

Almost surely, 2^656093917 is an apocalyptic number.

It is an amenable number.

656093917 is a deficient number, since it is larger than the sum of its proper divisors (1).

656093917 is an equidigital number, since it uses as much as digits as its factorization.

656093917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 656093917 is about 25614.3303055145. The cubic root of 656093917 is about 868.9377606901.

The spelling of 656093917 in words is "six hundred fifty-six million, ninety-three thousand, nine hundred seventeen".