31968997 has 2 divisors, whose sum is σ = 31968998. Its totient is φ = 31968996.

The previous prime is 31968953. The next prime is 31969019. The reversal of 31968997 is 79986913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28579716 + 3389281 = 5346^2 + 1841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31968997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31968907) 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, 15984498 + 15984499.

It is an arithmetic number, because the mean of its divisors is an integer number (15984499).

Almost surely, 2^31968997 is an apocalyptic number.

It is an amenable number.

31968997 is a deficient number, since it is larger than the sum of its proper divisors (1).

31968997 is an equidigital number, since it uses as much as digits as its factorization.

31968997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The square root of 31968997 is about 5654.1132814969. The cubic root of 31968997 is about 317.3776476916.

The spelling of 31968997 in words is "thirty-one million, nine hundred sixty-eight thousand, nine hundred ninety-seven".