31293994 has 8 divisors (see below), whose sum is σ = 47356740. Its totient is φ = 15508416.

The previous prime is 31293979. The next prime is 31294019. The reversal of 31293994 is 49939213.

It can be written as a sum of positive squares in 2 ways, for example, as 26904969 + 4389025 = 5187^2 + 2095^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 69009 + ... + 69460.

Almost surely, 2^31293994 is an apocalyptic number.

31293994 is a deficient number, since it is larger than the sum of its proper divisors (16062746).

31293994 is a wasteful number, since it uses less digits than its factorization.

31293994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138584.

The product of its digits is 52488, while the sum is 40.

The square root of 31293994 is about 5594.1035027965. The cubic root of 31293994 is about 315.1280037427.

The spelling of 31293994 in words is "thirty-one million, two hundred ninety-three thousand, nine hundred ninety-four".