313920785 has 4 divisors (see below), whose sum is σ = 376704948. Its totient is φ = 251136624.

The previous prime is 313920779. The next prime is 313920829. The reversal of 313920785 is 587029313.

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

It can be written as a sum of positive squares in 2 ways, for example, as 141681409 + 172239376 = 11903^2 + 13124^2 .

It is a cyclic number.

It is not a de Polignac number, because 313920785 - 2²² = 309726481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31392074 + ... + 31392083.

It is an arithmetic number, because the mean of its divisors is an integer number (94176237).

Almost surely, 2^313920785 is an apocalyptic number.

It is an amenable number.

313920785 is a deficient number, since it is larger than the sum of its proper divisors (62784163).

313920785 is an equidigital number, since it uses as much as digits as its factorization.

313920785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62784162.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 313920785 is about 17717.8098251449. The cubic root of 313920785 is about 679.6312771762.

The spelling of 313920785 in words is "three hundred thirteen million, nine hundred twenty thousand, seven hundred eighty-five".