31713097613 has 4 divisors (see below), whose sum is σ = 33091927968. Its totient is φ = 30334267260.

The previous prime is 31713097601. The next prime is 31713097631. The reversal of 31713097613 is 31679031713.

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 31713097613 - 2²⁰ = 31712049037 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 (31713097513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689415143 + ... + 689415188.

It is an arithmetic number, because the mean of its divisors is an integer number (8272981992).

Almost surely, 2^31713097613 is an apocalyptic number.

It is an amenable number.

31713097613 is a deficient number, since it is larger than the sum of its proper divisors (1378830355).

31713097613 is a wasteful number, since it uses less digits than its factorization.

31713097613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378830354.

The product of its (nonzero) digits is 71442, while the sum is 41.

The spelling of 31713097613 in words is "thirty-one billion, seven hundred thirteen million, ninety-seven thousand, six hundred thirteen".