31668863 has 2 divisors, whose sum is σ = 31668864. Its totient is φ = 31668862.

The previous prime is 31668829. The next prime is 31668869. The reversal of 31668863 is 36886613.

It is a strong prime.

It is an emirp because it is prime and its reverse (36886613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31668863 - 2⁸ = 31668607 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31668863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31668869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15834431 + 15834432.

It is an arithmetic number, because the mean of its divisors is an integer number (15834432).

Almost surely, 2^31668863 is an apocalyptic number.

31668863 is a deficient number, since it is larger than the sum of its proper divisors (1).

31668863 is an equidigital number, since it uses as much as digits as its factorization.

31668863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 31668863 is about 5627.5094846655. The cubic root of 31668863 is about 316.3813127767.

The spelling of 31668863 in words is "thirty-one million, six hundred sixty-eight thousand, eight hundred sixty-three".