313389 has 20 divisors (see below), whose sum is σ = 483516. Its totient is φ = 202176.

The previous prime is 313387. The next prime is 313399. The reversal of 313389 is 983313.

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 110889 = 450^2 + 333^2 .

It is not a de Polignac number, because 313389 - 2¹ = 313387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313381) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4257 + ... + 4329.

2³¹³³⁸⁹ is an apocalyptic number.

It is an amenable number.

313389 is a deficient number, since it is larger than the sum of its proper divisors (170127).

313389 is an equidigital number, since it uses as much as digits as its factorization.

313389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 129 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 313389 is about 559.8115754430. The cubic root of 313389 is about 67.9247292840.

The spelling of 313389 in words is "three hundred thirteen thousand, three hundred eighty-nine".