656188979 has 2 divisors, whose sum is σ = 656188980. Its totient is φ = 656188978.

The previous prime is 656188963. The next prime is 656189033. The reversal of 656188979 is 979881656.

656188979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656188979 - 2⁴ = 656188963 is a prime.

It is a super-3 number, since 3×656188979³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (656182979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328094489 + 328094490.

It is an arithmetic number, because the mean of its divisors is an integer number (328094490).

Almost surely, 2^656188979 is an apocalyptic number.

656188979 is a deficient number, since it is larger than the sum of its proper divisors (1).

656188979 is an equidigital number, since it uses as much as digits as its factorization.

656188979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 59.

The square root of 656188979 is about 25616.1858792444. The cubic root of 656188979 is about 868.9797257046.

The spelling of 656188979 in words is "six hundred fifty-six million, one hundred eighty-eight thousand, nine hundred seventy-nine".