680997311 has 2 divisors, whose sum is σ = 680997312. Its totient is φ = 680997310.

The previous prime is 680997287. The next prime is 680997319. The reversal of 680997311 is 113799086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680997311 - 2²² = 676803007 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680997319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340498655 + 340498656.

It is an arithmetic number, because the mean of its divisors is an integer number (340498656).

Almost surely, 2^680997311 is an apocalyptic number.

680997311 is a deficient number, since it is larger than the sum of its proper divisors (1).

680997311 is an equidigital number, since it uses as much as digits as its factorization.

680997311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 680997311 is about 26095.9251799970. The cubic root of 680997311 is about 879.7956270404.

The spelling of 680997311 in words is "six hundred eighty million, nine hundred ninety-seven thousand, three hundred eleven".