31968317 has 4 divisors (see below), whose sum is σ = 33650880. Its totient is φ = 30285756.

The previous prime is 31968301. The next prime is 31968359. The reversal of 31968317 is 71386913.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71386913 = 13 ⋅5491301.

It is a cyclic number.

It is not a de Polignac number, because 31968317 - 2⁴ = 31968301 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 (31961317) 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, 841253 + ... + 841290.

It is an arithmetic number, because the mean of its divisors is an integer number (8412720).

Almost surely, 2^31968317 is an apocalyptic number.

It is an amenable number.

31968317 is a deficient number, since it is larger than the sum of its proper divisors (1682563).

31968317 is a wasteful number, since it uses less digits than its factorization.

31968317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682562.

The product of its digits is 27216, while the sum is 38.

The square root of 31968317 is about 5654.0531479639. The cubic root of 31968317 is about 317.3753974038.

The spelling of 31968317 in words is "thirty-one million, nine hundred sixty-eight thousand, three hundred seventeen".