31232430989 has 4 divisors (see below), whose sum is σ = 31253268000. Its totient is φ = 31211593980.

The previous prime is 31232430979. The next prime is 31232431039. The reversal of 31232430989 is 98903423213.

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 31232430989 - 2¹² = 31232426893 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 (31232430979) 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, 10416257 + ... + 10419254.

It is an arithmetic number, because the mean of its divisors is an integer number (7813317000).

Almost surely, 2^31232430989 is an apocalyptic number.

It is an amenable number.

31232430989 is a deficient number, since it is larger than the sum of its proper divisors (20837011).

31232430989 is a wasteful number, since it uses less digits than its factorization.

31232430989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20837010.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 31232430989 in words is "thirty-one billion, two hundred thirty-two million, four hundred thirty thousand, nine hundred eighty-nine".