31984971 has 8 divisors (see below), whose sum is σ = 42929664. Its totient is φ = 21181800.

The previous prime is 31984969. The next prime is 31984987. The reversal of 31984971 is 17948913.

It is a happy number.

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

It is not a de Polignac number, because 31984971 - 2¹ = 31984969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31984921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34851 + ... + 35756.

It is an arithmetic number, because the mean of its divisors is an integer number (5366208).

Almost surely, 2^31984971 is an apocalyptic number.

31984971 is a deficient number, since it is larger than the sum of its proper divisors (10944693).

31984971 is a wasteful number, since it uses less digits than its factorization.

31984971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70761.

The product of its digits is 54432, while the sum is 42.

The square root of 31984971 is about 5655.5257050074. The cubic root of 31984971 is about 317.4305004223.

The spelling of 31984971 in words is "thirty-one million, nine hundred eighty-four thousand, nine hundred seventy-one".