31139092 has 12 divisors (see below), whose sum is σ = 54633460. Its totient is φ = 15529536.

The previous prime is 31139083. The next prime is 31139111. The reversal of 31139092 is 29093113.

It can be written as a sum of positive squares in 2 ways, for example, as 27920656 + 3218436 = 5284^2 + 1794^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31139092.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8217 + ... + 11392.

Almost surely, 2^31139092 is an apocalyptic number.

It is an amenable number.

31139092 is a deficient number, since it is larger than the sum of its proper divisors (23494368).

31139092 is a wasteful number, since it uses less digits than its factorization.

31139092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20010 (or 20008 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 31139092 is about 5580.2412134244. The cubic root of 31139092 is about 314.6071932470.

The spelling of 31139092 in words is "thirty-one million, one hundred thirty-nine thousand, ninety-two".