313638337 has 4 divisors (see below), whose sum is σ = 314428756. Its totient is φ = 312847920.

The previous prime is 313638329. The next prime is 313638341. The reversal of 313638337 is 733836313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 733836313 = 7 ⋅104833759.

It can be written as a sum of positive squares in 2 ways, for example, as 154853136 + 158785201 = 12444^2 + 12601^2 .

It is a cyclic number.

It is not a de Polignac number, because 313638337 - 2³ = 313638329 is a prime.

It is a super-2 number, since 2×313638337² = 196738012872251138, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313638296 and 313638305.

It is not an unprimeable number, because it can be changed into a prime (313638037) 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, 394614 + ... + 395407.

It is an arithmetic number, because the mean of its divisors is an integer number (78607189).

Almost surely, 2^313638337 is an apocalyptic number.

It is an amenable number.

313638337 is a deficient number, since it is larger than the sum of its proper divisors (790419).

313638337 is an equidigital number, since it uses as much as digits as its factorization.

313638337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790418.

The product of its digits is 81648, while the sum is 37.

The square root of 313638337 is about 17709.8372945660. The cubic root of 313638337 is about 679.4273848732.

The spelling of 313638337 in words is "three hundred thirteen million, six hundred thirty-eight thousand, three hundred thirty-seven".