31109994 has 20 divisors (see below), whose sum is σ = 69709794. Its totient is φ = 10369944.

The previous prime is 31109989. The next prime is 31110029. The reversal of 31109994 is 49990113.

It can be written as a sum of positive squares in only one way, i.e., 29844369 + 1265625 = 5463^2 + 1125^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 95857 + ... + 96180.

Almost surely, 2^31109994 is an apocalyptic number.

31109994 is an abundant number, since it is smaller than the sum of its proper divisors (38599800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31109994 is a wasteful number, since it uses less digits than its factorization.

31109994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192051 (or 192042 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 31109994 is about 5577.6333690912. The cubic root of 31109994 is about 314.5091675558.

The spelling of 31109994 in words is "thirty-one million, one hundred nine thousand, nine hundred ninety-four".