31391053989 has 8 divisors (see below), whose sum is σ = 42238727520. Its totient is φ = 20735374896.

The previous prime is 31391053957. The next prime is 31391054011. The reversal of 31391053989 is 98935019313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31391053989 - 2⁵ = 31391053957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31391053909) 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 7 ways as a sum of consecutive naturals, for example, 47998227 + ... + 47998880.

It is an arithmetic number, because the mean of its divisors is an integer number (5279840940).

Almost surely, 2^31391053989 is an apocalyptic number.

It is an amenable number.

31391053989 is a deficient number, since it is larger than the sum of its proper divisors (10847673531).

31391053989 is a wasteful number, since it uses less digits than its factorization.

31391053989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95997219.

The product of its (nonzero) digits is 787320, while the sum is 51.

The spelling of 31391053989 in words is "thirty-one billion, three hundred ninety-one million, fifty-three thousand, nine hundred eighty-nine".