31673134399 has 2 divisors, whose sum is σ = 31673134400. Its totient is φ = 31673134398.

The previous prime is 31673134397. The next prime is 31673134459. The reversal of 31673134399 is 99343137613.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31673134399 - 2¹ = 31673134397 is a prime.

Together with 31673134397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31673134397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15836567199 + 15836567200.

It is an arithmetic number, because the mean of its divisors is an integer number (15836567200).

Almost surely, 2^31673134399 is an apocalyptic number.

31673134399 is a deficient number, since it is larger than the sum of its proper divisors (1).

31673134399 is an equidigital number, since it uses as much as digits as its factorization.

31673134399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 49.

The spelling of 31673134399 in words is "thirty-one billion, six hundred seventy-three million, one hundred thirty-four thousand, three hundred ninety-nine".