31742830717 has 4 divisors (see below), whose sum is σ = 34184586940. Its totient is φ = 29301074496.

The previous prime is 31742830709. The next prime is 31742830739. The reversal of 31742830717 is 71703824713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15393116761 + 16349713956 = 124069^2 + 127866^2 .

It is a cyclic number.

It is not a de Polignac number, because 31742830717 - 2³ = 31742830709 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 (31742830417) 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, 1220878092 + ... + 1220878117.

It is an arithmetic number, because the mean of its divisors is an integer number (8546146735).

Almost surely, 2^31742830717 is an apocalyptic number.

It is an amenable number.

31742830717 is a deficient number, since it is larger than the sum of its proper divisors (2441756223).

31742830717 is a wasteful number, since it uses less digits than its factorization.

31742830717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441756222.

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 31742830717 in words is "thirty-one billion, seven hundred forty-two million, eight hundred thirty thousand, seven hundred seventeen".