682646639 has 2 divisors, whose sum is σ = 682646640. Its totient is φ = 682646638.

The previous prime is 682646623. The next prime is 682646651. The reversal of 682646639 is 936646286.

682646639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 682646639 - 2⁴ = 682646623 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 (682646539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341323319 + 341323320.

It is an arithmetic number, because the mean of its divisors is an integer number (341323320).

Almost surely, 2^682646639 is an apocalyptic number.

682646639 is a deficient number, since it is larger than the sum of its proper divisors (1).

682646639 is an equidigital number, since it uses as much as digits as its factorization.

682646639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 50.

The square root of 682646639 is about 26127.5073246569. The cubic root of 682646639 is about 880.5053222905.

The spelling of 682646639 in words is "six hundred eighty-two million, six hundred forty-six thousand, six hundred thirty-nine".