31668017 has 2 divisors, whose sum is σ = 31668018. Its totient is φ = 31668016.

The previous prime is 31668011. The next prime is 31668047. The reversal of 31668017 is 71086613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21939856 + 9728161 = 4684^2 + 3119^2 .

It is a cyclic number.

It is not a de Polignac number, because 31668017 - 2⁴ = 31668001 is a prime.

It is not a weakly prime, because it can be changed into another prime (31668011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15834008 + 15834009.

It is an arithmetic number, because the mean of its divisors is an integer number (15834009).

Almost surely, 2^31668017 is an apocalyptic number.

It is an amenable number.

31668017 is a deficient number, since it is larger than the sum of its proper divisors (1).

31668017 is an equidigital number, since it uses as much as digits as its factorization.

31668017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 31668017 is about 5627.4343176975. The cubic root of 31668017 is about 316.3784954882.

The spelling of 31668017 in words is "thirty-one million, six hundred sixty-eight thousand, seventeen".