313387391 has 4 divisors (see below), whose sum is σ = 317354400. Its totient is φ = 309420384.

The previous prime is 313387343. The next prime is 313387411. The reversal of 313387391 is 193783313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193783313 = 107 ⋅1811059.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313387391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313387301) 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 3 ways as a sum of consecutive naturals, for example, 1983386 + ... + 1983543.

It is an arithmetic number, because the mean of its divisors is an integer number (79338600).

Almost surely, 2^313387391 is an apocalyptic number.

313387391 is a deficient number, since it is larger than the sum of its proper divisors (3967009).

313387391 is an equidigital number, since it uses as much as digits as its factorization.

313387391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967008.

The product of its digits is 40824, while the sum is 38.

The square root of 313387391 is about 17702.7509444154. The cubic root of 313387391 is about 679.2461303755.

The spelling of 313387391 in words is "three hundred thirteen million, three hundred eighty-seven thousand, three hundred ninety-one".