313865 has 4 divisors (see below), whose sum is σ = 376644. Its totient is φ = 251088.

The previous prime is 313853. The next prime is 313879. The reversal of 313865 is 568313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568313 = 29 ⋅19597.

It can be written as a sum of positive squares in 2 ways, for example, as 204304 + 109561 = 452^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 313865 - 2⁴ = 313849 is a prime.

It is a super-2 number, since 2×313865² = 197022476450, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 313865.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31382 + ... + 31391.

It is an arithmetic number, because the mean of its divisors is an integer number (94161).

2³¹³⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

313865 is a deficient number, since it is larger than the sum of its proper divisors (62779).

313865 is an equidigital number, since it uses as much as digits as its factorization.

313865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62778.

The product of its digits is 2160, while the sum is 26.

The square root of 313865 is about 560.2365571792. The cubic root of 313865 is about 67.9591017044.

The spelling of 313865 in words is "three hundred thirteen thousand, eight hundred sixty-five".