313403731 has 2 divisors, whose sum is σ = 313403732. Its totient is φ = 313403730.

The previous prime is 313403729. The next prime is 313403743. The reversal of 313403731 is 137304313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313403731 - 2¹ = 313403729 is a prime.

It is a super-2 number, since 2×313403731² = 196443797209440722, which contains 22 as substring.

Together with 313403729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 313403696 and 313403705.

It is not a weakly prime, because it can be changed into another prime (313403771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156701865 + 156701866.

It is an arithmetic number, because the mean of its divisors is an integer number (156701866).

Almost surely, 2^313403731 is an apocalyptic number.

313403731 is a deficient number, since it is larger than the sum of its proper divisors (1).

313403731 is an equidigital number, since it uses as much as digits as its factorization.

313403731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 313403731 is about 17703.2124485925. The cubic root of 313403731 is about 679.2579354546.

The spelling of 313403731 in words is "three hundred thirteen million, four hundred three thousand, seven hundred thirty-one".