31672989 has 12 divisors (see below), whose sum is σ = 48441276. Its totient is φ = 19873152.

The previous prime is 31672987. The next prime is 31673003. The reversal of 31672989 is 98927613.

It can be written as a sum of positive squares in 2 ways, for example, as 19873764 + 11799225 = 4458^2 + 3435^2 .

It is not a de Polignac number, because 31672989 - 2¹ = 31672987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31672987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103354 + ... + 103659.

It is an arithmetic number, because the mean of its divisors is an integer number (4036773).

Almost surely, 2^31672989 is an apocalyptic number.

It is an amenable number.

31672989 is a deficient number, since it is larger than the sum of its proper divisors (16768287).

31672989 is a wasteful number, since it uses less digits than its factorization.

31672989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207036 (or 207033 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 31672989 is about 5627.8760647335. The cubic root of 31672989 is about 316.3950521670.

The spelling of 31672989 in words is "thirty-one million, six hundred seventy-two thousand, nine hundred eighty-nine".