680974581 has 16 divisors (see below), whose sum is σ = 1057256064. Its totient is φ = 381785664.

The previous prime is 680974577. The next prime is 680974583. The reversal of 680974581 is 185479086.

It is not a de Polignac number, because 680974581 - 2² = 680974577 is a prime.

It is a super-2 number, since 2×680974581² = 927452759936251122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 680974581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680974583) 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, 304806 + ... + 307031.

It is an arithmetic number, because the mean of its divisors is an integer number (66078504).

Almost surely, 2^680974581 is an apocalyptic number.

It is an amenable number.

680974581 is a deficient number, since it is larger than the sum of its proper divisors (376281483).

680974581 is a wasteful number, since it uses less digits than its factorization.

680974581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611900.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 680974581 is about 26095.4896677568. The cubic root of 680974581 is about 879.7858384667.

The spelling of 680974581 in words is "six hundred eighty million, nine hundred seventy-four thousand, five hundred eighty-one".