680923647 has 12 divisors (see below), whose sum is σ = 983895120. Its totient is φ = 453792768.

The previous prime is 680923637. The next prime is 680923657. The reversal of 680923647 is 746329086.

It is an interprime number because it is at equal distance from previous prime (680923637) and next prime (680923657).

It is not a de Polignac number, because 680923647 - 2⁴ = 680923631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680923637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18598 + ... + 41324.

It is an arithmetic number, because the mean of its divisors is an integer number (81991260).

Almost surely, 2^680923647 is an apocalyptic number.

680923647 is a deficient number, since it is larger than the sum of its proper divisors (302971473).

680923647 is a wasteful number, since it uses less digits than its factorization.

680923647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26062 (or 26059 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 680923647 is about 26094.5137337334. The cubic root of 680923647 is about 879.7639031745.

The spelling of 680923647 in words is "six hundred eighty million, nine hundred twenty-three thousand, six hundred forty-seven".