31598872489 has 4 divisors (see below), whose sum is σ = 31618987920. Its totient is φ = 31578757060.

The previous prime is 31598872471. The next prime is 31598872531. The reversal of 31598872489 is 98427889513.

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 a de Polignac number, because none of the positive numbers 2^k-31598872489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31598872489.

It is not an unprimeable number, because it can be changed into a prime (31598872889) 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, 10055359 + ... + 10058500.

It is an arithmetic number, because the mean of its divisors is an integer number (7904746980).

Almost surely, 2^31598872489 is an apocalyptic number.

It is an amenable number.

31598872489 is a deficient number, since it is larger than the sum of its proper divisors (20115431).

31598872489 is a wasteful number, since it uses less digits than its factorization.

31598872489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20115430.

The product of its digits is 34836480, while the sum is 64.

The spelling of 31598872489 in words is "thirty-one billion, five hundred ninety-eight million, eight hundred seventy-two thousand, four hundred eighty-nine".