785313681 has 8 divisors (see below), whose sum is σ = 1102194720. Its totient is φ = 495987552.

The previous prime is 785313677. The next prime is 785313689. The reversal of 785313681 is 186313587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 785313681 - 2² = 785313677 is a prime.

It is a super-2 number, since 2×785313681² = 1233435155131539522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (785313689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6888660 + ... + 6888773.

It is an arithmetic number, because the mean of its divisors is an integer number (137774340).

Almost surely, 2^785313681 is an apocalyptic number.

It is an amenable number.

785313681 is a deficient number, since it is larger than the sum of its proper divisors (316881039).

785313681 is a wasteful number, since it uses less digits than its factorization.

785313681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13777455.

The product of its digits is 120960, while the sum is 42.

The square root of 785313681 is about 28023.4487706278. The cubic root of 785313681 is about 922.6019916464.

The spelling of 785313681 in words is "seven hundred eighty-five million, three hundred thirteen thousand, six hundred eighty-one".