313081387 has 12 divisors (see below), whose sum is σ = 320278320. Its totient is φ = 306032720.

The previous prime is 313081357. The next prime is 313081397. The reversal of 313081387 is 783180313.

It is not a de Polignac number, because 313081387 - 2¹¹ = 313079339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313081357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871914 + ... + 872272.

It is an arithmetic number, because the mean of its divisors is an integer number (26689860).

Almost surely, 2^313081387 is an apocalyptic number.

313081387 is a deficient number, since it is larger than the sum of its proper divisors (7196933).

313081387 is an equidigital number, since it uses as much as digits as its factorization.

313081387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 313081387 is about 17694.1059960655. The cubic root of 313081387 is about 679.0249773369.

The spelling of 313081387 in words is "three hundred thirteen million, eighty-one thousand, three hundred eighty-seven".