31946 has 4 divisors (see below), whose sum is σ = 47922. Its totient is φ = 15972.

The previous prime is 31907. The next prime is 31957. The reversal of 31946 is 64913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64913 = 139 ⋅467.

It can be written as a sum of positive squares in only one way, i.e., 24025 + 7921 = 155^2 + 89^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7985 + ... + 7988.

2³¹⁹⁴⁶ is an apocalyptic number.

31946 is a deficient number, since it is larger than the sum of its proper divisors (15976).

31946 is a wasteful number, since it uses less digits than its factorization.

31946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15975.

The product of its digits is 648, while the sum is 23.

The square root of 31946 is about 178.7344398822. The cubic root of 31946 is about 31.7301527228.

The spelling of 31946 in words is "thirty-one thousand, nine hundred forty-six".