31699994323 has 2 divisors, whose sum is σ = 31699994324. Its totient is φ = 31699994322.

The previous prime is 31699994321. The next prime is 31699994357. The reversal of 31699994323 is 32349999613.

It is a weak prime.

It is an emirp because it is prime and its reverse (32349999613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31699994323 - 2¹ = 31699994321 is a prime.

Together with 31699994321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31699994321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15849997161 + 15849997162.

It is an arithmetic number, because the mean of its divisors is an integer number (15849997162).

Almost surely, 2^31699994323 is an apocalyptic number.

31699994323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31699994323 is an equidigital number, since it uses as much as digits as its factorization.

31699994323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8503056, while the sum is 58.

The spelling of 31699994323 in words is "thirty-one billion, six hundred ninety-nine million, nine hundred ninety-four thousand, three hundred twenty-three".