680641331 has 4 divisors (see below), whose sum is σ = 681463200. Its totient is φ = 679819464.

The previous prime is 680641321. The next prime is 680641333. The reversal of 680641331 is 133146086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 680641331 - 2¹⁰ = 680640307 is a prime.

It is a super-2 number, since 2×680641331² = 926545242930903122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680641333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409691 + ... + 411348.

It is an arithmetic number, because the mean of its divisors is an integer number (170365800).

Almost surely, 2^680641331 is an apocalyptic number.

680641331 is a deficient number, since it is larger than the sum of its proper divisors (821869).

680641331 is an equidigital number, since it uses as much as digits as its factorization.

680641331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821868.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 680641331 is about 26089.1036833388. The cubic root of 680641331 is about 879.6423008183.

The spelling of 680641331 in words is "six hundred eighty million, six hundred forty-one thousand, three hundred thirty-one".