679186979 has 2 divisors, whose sum is σ = 679186980. Its totient is φ = 679186978.

The previous prime is 679186927. The next prime is 679186999. The reversal of 679186979 is 979681976.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 679186979 - 2²⁴ = 662409763 is a prime.

It is a super-2 number, since 2×679186979² = 922589904886292882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (679186909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339593489 + 339593490.

It is an arithmetic number, because the mean of its divisors is an integer number (339593490).

Almost surely, 2^679186979 is an apocalyptic number.

679186979 is a deficient number, since it is larger than the sum of its proper divisors (1).

679186979 is an equidigital number, since it uses as much as digits as its factorization.

679186979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 62.

The square root of 679186979 is about 26061.2159923515. The cubic root of 679186979 is about 879.0153324248.

The spelling of 679186979 in words is "six hundred seventy-nine million, one hundred eighty-six thousand, nine hundred seventy-nine".