680398917 has 16 divisors (see below), whose sum is σ = 990409728. Its totient is φ = 412055280.

The previous prime is 680398913. The next prime is 680398921. The reversal of 680398917 is 719893086.

It is an interprime number because it is at equal distance from previous prime (680398913) and next prime (680398921).

It is not a de Polignac number, because 680398917 - 2² = 680398913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 680398917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680398913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41988 + ... + 55890.

It is an arithmetic number, because the mean of its divisors is an integer number (61900608).

Almost surely, 2^680398917 is an apocalyptic number.

It is an amenable number.

680398917 is a deficient number, since it is larger than the sum of its proper divisors (310010811).

680398917 is a wasteful number, since it uses less digits than its factorization.

680398917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15400.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 680398917 is about 26084.4573836605. The cubic root of 680398917 is about 879.5378586698.

The spelling of 680398917 in words is "six hundred eighty million, three hundred ninety-eight thousand, nine hundred seventeen".