680939599 has 2 divisors, whose sum is σ = 680939600. Its totient is φ = 680939598.

The previous prime is 680939551. The next prime is 680939621. The reversal of 680939599 is 995939086.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680939599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680939299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340469799 + 340469800.

It is an arithmetic number, because the mean of its divisors is an integer number (340469800).

Almost surely, 2^680939599 is an apocalyptic number.

680939599 is a deficient number, since it is larger than the sum of its proper divisors (1).

680939599 is an equidigital number, since it uses as much as digits as its factorization.

680939599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4723920, while the sum is 58.

The square root of 680939599 is about 26094.8193900628. The cubic root of 680939599 is about 879.7707731979.

The spelling of 680939599 in words is "six hundred eighty million, nine hundred thirty-nine thousand, five hundred ninety-nine".