31347458717 has 4 divisors (see below), whose sum is σ = 31460626716. Its totient is φ = 31234290720.

The previous prime is 31347458687. The next prime is 31347458719. The reversal of 31347458717 is 71785474313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71785474313 = 7 ⋅10255067759.

It can be written as a sum of positive squares in 2 ways, for example, as 12761317156 + 18586141561 = 112966^2 + 136331^2 .

It is a cyclic number.

It is not a de Polignac number, because 31347458717 - 2³² = 27052491421 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 (31347458719) 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, 56583584 + ... + 56584137.

It is an arithmetic number, because the mean of its divisors is an integer number (7865156679).

Almost surely, 2^31347458717 is an apocalyptic number.

It is an amenable number.

31347458717 is a deficient number, since it is larger than the sum of its proper divisors (113167999).

31347458717 is a wasteful number, since it uses less digits than its factorization.

31347458717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113167998.

The product of its digits is 1975680, while the sum is 50.

The spelling of 31347458717 in words is "thirty-one billion, three hundred forty-seven million, four hundred fifty-eight thousand, seven hundred seventeen".