31609946 has 8 divisors (see below), whose sum is σ = 47440404. Its totient is φ = 15796480.

The previous prime is 31609937. The next prime is 31609957. The reversal of 31609946 is 64990613.

It can be written as a sum of positive squares in 2 ways, for example, as 29539225 + 2070721 = 5435^2 + 1439^2 .

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

It is a super-2 number, since 2×31609946² = 1998377372245832, which contains 22 as substring.

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, 2636 + ... + 8376.

Almost surely, 2^31609946 is an apocalyptic number.

31609946 is a deficient number, since it is larger than the sum of its proper divisors (15830458).

31609946 is a wasteful number, since it uses less digits than its factorization.

31609946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8496.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 31609946 is about 5622.2723164215. The cubic root of 31609946 is about 316.1849915589.

The spelling of 31609946 in words is "thirty-one million, six hundred nine thousand, nine hundred forty-six".