680575979 has 2 divisors, whose sum is σ = 680575980. Its totient is φ = 680575978.

The previous prime is 680575949. The next prime is 680576009. The reversal of 680575979 is 979575086.

It is a balanced prime because it is at equal distance from previous prime (680575949) and next prime (680576009).

It is a cyclic number.

It is not a de Polignac number, because 680575979 - 2⁸ = 680575723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (680575949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340287989 + 340287990.

It is an arithmetic number, because the mean of its divisors is an integer number (340287990).

Almost surely, 2^680575979 is an apocalyptic number.

680575979 is a deficient number, since it is larger than the sum of its proper divisors (1).

680575979 is an equidigital number, since it uses as much as digits as its factorization.

680575979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4762800, while the sum is 56.

The square root of 680575979 is about 26087.8511763618. The cubic root of 680575979 is about 879.6141468695.

The spelling of 680575979 in words is "six hundred eighty million, five hundred seventy-five thousand, nine hundred seventy-nine".