31980589 has 4 divisors (see below), whose sum is σ = 32012640. Its totient is φ = 31948540.

The previous prime is 31980583. The next prime is 31980593. The reversal of 31980589 is 98508913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31980589 - 2³ = 31980581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31980581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14479 + ... + 16540.

It is an arithmetic number, because the mean of its divisors is an integer number (8003160).

Almost surely, 2^31980589 is an apocalyptic number.

It is an amenable number.

31980589 is a deficient number, since it is larger than the sum of its proper divisors (32051).

31980589 is a wasteful number, since it uses less digits than its factorization.

31980589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32050.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 31980589 is about 5655.1382830131. The cubic root of 31980589 is about 317.4160035723.

It can be divided in two parts, 319 and 80589, that added together give a palindrome (80908).

The spelling of 31980589 in words is "thirty-one million, nine hundred eighty thousand, five hundred eighty-nine".