680998437 has 24 divisors (see below), whose sum is σ = 1183357760. Its totient is φ = 368660160.

The previous prime is 680998433. The next prime is 680998441. The reversal of 680998437 is 734899086.

It is an interprime number because it is at equal distance from previous prime (680998433) and next prime (680998441).

It is not a de Polignac number, because 680998437 - 2² = 680998433 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680998433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283264 + ... + 285657.

Almost surely, 2^680998437 is an apocalyptic number.

It is an amenable number.

680998437 is a deficient number, since it is larger than the sum of its proper divisors (502359323).

680998437 is a wasteful number, since it uses less digits than its factorization.

680998437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568953 (or 568950 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 680998437 is about 26095.9467542375. The cubic root of 680998437 is about 879.7961119416.

The spelling of 680998437 in words is "six hundred eighty million, nine hundred ninety-eight thousand, four hundred thirty-seven".