31373 has 4 divisors (see below), whose sum is σ = 31740. Its totient is φ = 31008.

The previous prime is 31357. The next prime is 31379. The reversal of 31373 is 37313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 24649 + 6724 = 157^2 + 82^2 .

It is a cyclic number.

It is not a de Polignac number, because 31373 - 2⁴ = 31357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31379) 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, 23 + ... + 251.

It is an arithmetic number, because the mean of its divisors is an integer number (7935).

2³¹³⁷³ is an apocalyptic number.

It is an amenable number.

31373 is a deficient number, since it is larger than the sum of its proper divisors (367).

31373 is a wasteful number, since it uses less digits than its factorization.

31373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366.

The product of its digits is 189, while the sum is 17.

The square root of 31373 is about 177.1242501748. The cubic root of 31373 is about 31.5392975571.

Adding to 31373 its reverse (37313), we get a palindrome (68686).

It can be divided in two parts, 31 and 373, that added together give a palindrome (404).

The spelling of 31373 in words is "thirty-one thousand, three hundred seventy-three".