785681313 has 4 divisors (see below), whose sum is σ = 1047575088. Its totient is φ = 523787540.

The previous prime is 785681291. The next prime is 785681327. The reversal of 785681313 is 313186587.

785681313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 785681313 - 2¹⁰ = 785680289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (785681383) 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, 130946883 + ... + 130946888.

It is an arithmetic number, because the mean of its divisors is an integer number (261893772).

Almost surely, 2^785681313 is an apocalyptic number.

It is an amenable number.

785681313 is a deficient number, since it is larger than the sum of its proper divisors (261893775).

785681313 is a wasteful number, since it uses less digits than its factorization.

785681313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261893774.

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

The square root of 785681313 is about 28030.0073671057. The cubic root of 785681313 is about 922.7459362936.

The spelling of 785681313 in words is "seven hundred eighty-five million, six hundred eighty-one thousand, three hundred thirteen".