656076979 has 2 divisors, whose sum is σ = 656076980. Its totient is φ = 656076978.

The previous prime is 656076959. The next prime is 656076997. The reversal of 656076979 is 979670656.

Together with next prime (656076997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656076979 is a prime.

It is not a weakly prime, because it can be changed into another prime (656076959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328038489 + 328038490.

It is an arithmetic number, because the mean of its divisors is an integer number (328038490).

Almost surely, 2^656076979 is an apocalyptic number.

656076979 is a deficient number, since it is larger than the sum of its proper divisors (1).

656076979 is an equidigital number, since it uses as much as digits as its factorization.

656076979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4286520, while the sum is 55.

The square root of 656076979 is about 25613.9996681502. Note that the first 3 decimals coincide. The cubic root of 656076979 is about 868.9302830033.

The spelling of 656076979 in words is "six hundred fifty-six million, seventy-six thousand, nine hundred seventy-nine".