680976409 has 4 divisors (see below), whose sum is σ = 691140304. Its totient is φ = 670812516.

The previous prime is 680976403. The next prime is 680976419. The reversal of 680976409 is 904679086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 680976409 - 2⁵ = 680976377 is a prime.

It is a super-2 number, since 2×680976409² = 927457739229070562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680976403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5081847 + ... + 5081980.

It is an arithmetic number, because the mean of its divisors is an integer number (172785076).

Almost surely, 2^680976409 is an apocalyptic number.

It is an amenable number.

680976409 is a deficient number, since it is larger than the sum of its proper divisors (10163895).

680976409 is a wasteful number, since it uses less digits than its factorization.

680976409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10163894.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 680976409 is about 26095.5246929430. The cubic root of 680976409 is about 879.7866256948.

The spelling of 680976409 in words is "six hundred eighty million, nine hundred seventy-six thousand, four hundred nine".