31987483 has 4 divisors (see below), whose sum is σ = 34895448. Its totient is φ = 29079520.

The previous prime is 31987477. The next prime is 31987511. The reversal of 31987483 is 38478913.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38478913 = 11 ⋅3498083.

It is a cyclic number.

It is not a de Polignac number, because 31987483 - 2⁵ = 31987451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31987433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453966 + ... + 1453987.

It is an arithmetic number, because the mean of its divisors is an integer number (8723862).

Almost surely, 2^31987483 is an apocalyptic number.

31987483 is a deficient number, since it is larger than the sum of its proper divisors (2907965).

31987483 is a wasteful number, since it uses less digits than its factorization.

31987483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907964.

The product of its digits is 145152, while the sum is 43.

The square root of 31987483 is about 5655.7477843341. The cubic root of 31987483 is about 317.4388102057.

The spelling of 31987483 in words is "thirty-one million, nine hundred eighty-seven thousand, four hundred eighty-three".