31996983 has 4 divisors (see below), whose sum is σ = 42662648. Its totient is φ = 21331320.

The previous prime is 31996973. The next prime is 31997023. The reversal of 31996983 is 38969913.

It is a happy number.

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

It is not a de Polignac number, because 31996983 - 2¹⁰ = 31995959 is a prime.

It is a super-2 number, since 2×31996983² = 2047613842204578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31996973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5332828 + ... + 5332833.

It is an arithmetic number, because the mean of its divisors is an integer number (10665662).

Almost surely, 2^31996983 is an apocalyptic number.

31996983 is a deficient number, since it is larger than the sum of its proper divisors (10665665).

31996983 is a wasteful number, since it uses less digits than its factorization.

31996983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665664.

The product of its digits is 314928, while the sum is 48.

The square root of 31996983 is about 5656.5875755618. The cubic root of 31996983 is about 317.4702326030.

The spelling of 31996983 in words is "thirty-one million, nine hundred ninety-six thousand, nine hundred eighty-three".