681437313 has 16 divisors (see below), whose sum is σ = 1012600000. Its totient is φ = 452913120.

The previous prime is 681437303. The next prime is 681437327. The reversal of 681437313 is 313734186.

It is not a de Polignac number, because 681437313 - 2²² = 677243009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681437303) 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 15 ways as a sum of consecutive naturals, for example, 29188 + ... + 47061.

It is an arithmetic number, because the mean of its divisors is an integer number (63287500).

Almost surely, 2^681437313 is an apocalyptic number.

It is an amenable number.

681437313 is a deficient number, since it is larger than the sum of its proper divisors (331162687).

681437313 is a wasteful number, since it uses less digits than its factorization.

681437313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76589 (or 76583 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 681437313 is about 26104.3542919567. The cubic root of 681437313 is about 879.9850690476.

The spelling of 681437313 in words is "six hundred eighty-one million, four hundred thirty-seven thousand, three hundred thirteen".