679624961 has 2 divisors, whose sum is σ = 679624962. Its totient is φ = 679624960.

The previous prime is 679624951. The next prime is 679625021. The reversal of 679624961 is 169426976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 670810000 + 8814961 = 25900^2 + 2969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679624961 is a prime.

It is a super-2 number, since 2×679624961² = 923780175228503042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (679624901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339812480 + 339812481.

It is an arithmetic number, because the mean of its divisors is an integer number (339812481).

Almost surely, 2^679624961 is an apocalyptic number.

It is an amenable number.

679624961 is a deficient number, since it is larger than the sum of its proper divisors (1).

679624961 is an equidigital number, since it uses as much as digits as its factorization.

679624961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 679624961 is about 26069.6175844603. The cubic root of 679624961 is about 879.2042397405.

The spelling of 679624961 in words is "six hundred seventy-nine million, six hundred twenty-four thousand, nine hundred sixty-one".