31968899 has 2 divisors, whose sum is σ = 31968900. Its totient is φ = 31968898.

The previous prime is 31968877. The next prime is 31968901. The reversal of 31968899 is 99886913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31968899 - 2¹⁶ = 31903363 is a prime.

Together with 31968901, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31968899.

It is not a weakly prime, because it can be changed into another prime (31968199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15984449 + 15984450.

It is an arithmetic number, because the mean of its divisors is an integer number (15984450).

Almost surely, 2^31968899 is an apocalyptic number.

31968899 is a deficient number, since it is larger than the sum of its proper divisors (1).

31968899 is an equidigital number, since it uses as much as digits as its factorization.

31968899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 53.

The square root of 31968899 is about 5654.1046152331. The cubic root of 31968899 is about 317.3773233874.

The spelling of 31968899 in words is "thirty-one million, nine hundred sixty-eight thousand, eight hundred ninety-nine".