31663963 has 2 divisors, whose sum is σ = 31663964. Its totient is φ = 31663962.

The previous prime is 31663921. The next prime is 31663997. The reversal of 31663963 is 36936613.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31663963 is a prime.

It is not a weakly prime, because it can be changed into another prime (31663913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15831981 + 15831982.

It is an arithmetic number, because the mean of its divisors is an integer number (15831982).

Almost surely, 2^31663963 is an apocalyptic number.

31663963 is a deficient number, since it is larger than the sum of its proper divisors (1).

31663963 is an equidigital number, since it uses as much as digits as its factorization.

31663963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 37.

The square root of 31663963 is about 5627.0741064962. The cubic root of 31663963 is about 316.3649944517.

The spelling of 31663963 in words is "thirty-one million, six hundred sixty-three thousand, nine hundred sixty-three".