31339 has 12 divisors (see below), whose sum is σ = 40432. Its totient is φ = 23760.

The previous prime is 31337. The next prime is 31357. The reversal of 31339 is 93313.

31339 = T₄₂ + T₄₃ + ... + T₆₃.

It is a happy number.

It is not a de Polignac number, because 31339 - 2¹ = 31337 is a prime.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 13.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (31333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 829 + ... + 865.

2³¹³³⁹ is an apocalyptic number.

31339 is a deficient number, since it is larger than the sum of its proper divisors (9093).

31339 is a wasteful number, since it uses less digits than its factorization.

31339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 55 counting only the distinct ones).

The product of its digits is 243, while the sum is 19.

The square root of 31339 is about 177.0282463337. The cubic root of 31339 is about 31.5279000314.

The spelling of 31339 in words is "thirty-one thousand, three hundred thirty-nine".