680065931 has 2 divisors, whose sum is σ = 680065932. Its totient is φ = 680065930.

The previous prime is 680065927. The next prime is 680065951. The reversal of 680065931 is 139560086.

680065931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680065931 - 2² = 680065927 is a prime.

It is a super-2 number, since 2×680065931² = 924979341013793522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (680065901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340032965 + 340032966.

It is an arithmetic number, because the mean of its divisors is an integer number (340032966).

Almost surely, 2^680065931 is an apocalyptic number.

680065931 is a deficient number, since it is larger than the sum of its proper divisors (1).

680065931 is an equidigital number, since it uses as much as digits as its factorization.

680065931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 680065931 is about 26078.0737593864. The cubic root of 680065931 is about 879.3943538443.

It can be divided in two parts, 68006 and 5931, that added together give a palindrome (73937).

The spelling of 680065931 in words is "six hundred eighty million, sixty-five thousand, nine hundred thirty-one".