31385589 has 4 divisors (see below), whose sum is σ = 41847456. Its totient is φ = 20923724.

The previous prime is 31385579. The next prime is 31385591. The reversal of 31385589 is 98558313.

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 31385589 - 2⁷ = 31385461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31385589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31385539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5230929 + ... + 5230934.

It is an arithmetic number, because the mean of its divisors is an integer number (10461864).

Almost surely, 2^31385589 is an apocalyptic number.

It is an amenable number.

31385589 is a deficient number, since it is larger than the sum of its proper divisors (10461867).

31385589 is a wasteful number, since it uses less digits than its factorization.

31385589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10461866.

The product of its digits is 129600, while the sum is 42.

The square root of 31385589 is about 5602.2842662614. The cubic root of 31385589 is about 315.4351556965.

The spelling of 31385589 in words is "thirty-one million, three hundred eighty-five thousand, five hundred eighty-nine".