31347994 has 4 divisors (see below), whose sum is σ = 47021994. Its totient is φ = 15673996.

The previous prime is 31347959. The next prime is 31348001. The reversal of 31347994 is 49974313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27092025 + 4255969 = 5205^2 + 2063^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7836997 + ... + 7837000.

Almost surely, 2^31347994 is an apocalyptic number.

31347994 is a deficient number, since it is larger than the sum of its proper divisors (15674000).

31347994 is a wasteful number, since it uses less digits than its factorization.

31347994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15673999.

The product of its digits is 81648, while the sum is 40.

The square root of 31347994 is about 5598.9279330958. The cubic root of 31347994 is about 315.3091581373.

The spelling of 31347994 in words is "thirty-one million, three hundred forty-seven thousand, nine hundred ninety-four".