679880867 has 2 divisors, whose sum is σ = 679880868. Its totient is φ = 679880866.

The previous prime is 679880863. The next prime is 679880909. The reversal of 679880867 is 768088976.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679880867 - 2² = 679880863 is a prime.

It is not a weakly prime, because it can be changed into another prime (679880863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339940433 + 339940434.

It is an arithmetic number, because the mean of its divisors is an integer number (339940434).

Almost surely, 2^679880867 is an apocalyptic number.

679880867 is a deficient number, since it is larger than the sum of its proper divisors (1).

679880867 is an equidigital number, since it uses as much as digits as its factorization.

679880867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 59.

The square root of 679880867 is about 26074.5252497529. The cubic root of 679880867 is about 879.3145777550.

The spelling of 679880867 in words is "six hundred seventy-nine million, eight hundred eighty thousand, eight hundred sixty-seven".