31712717 has 4 divisors (see below), whose sum is σ = 31738080. Its totient is φ = 31687356.

The previous prime is 31712693. The next prime is 31712719. The reversal of 31712717 is 71721713.

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 31712717 - 2¹⁶ = 31647181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31712717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31712719) 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, 10703 + ... + 13340.

It is an arithmetic number, because the mean of its divisors is an integer number (7934520).

Almost surely, 2^31712717 is an apocalyptic number.

It is an amenable number.

31712717 is a deficient number, since it is larger than the sum of its proper divisors (25363).

31712717 is a wasteful number, since it uses less digits than its factorization.

31712717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25362.

The product of its digits is 2058, while the sum is 29.

The square root of 31712717 is about 5631.4045317310. The cubic root of 31712717 is about 316.5272835647.

The spelling of 31712717 in words is "thirty-one million, seven hundred twelve thousand, seven hundred seventeen".