31963349329 has 2 divisors, whose sum is σ = 31963349330. Its totient is φ = 31963349328.

The previous prime is 31963349309. The next prime is 31963349347. The reversal of 31963349329 is 92394336913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25648663104 + 6314686225 = 160152^2 + 79465^2 .

It is a cyclic number.

It is not a de Polignac number, because 31963349329 - 2⁹ = 31963348817 is a prime.

It is not a weakly prime, because it can be changed into another prime (31963349309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15981674664 + 15981674665.

It is an arithmetic number, because the mean of its divisors is an integer number (15981674665).

Almost surely, 2^31963349329 is an apocalyptic number.

It is an amenable number.

31963349329 is a deficient number, since it is larger than the sum of its proper divisors (1).

31963349329 is an equidigital number, since it uses as much as digits as its factorization.

31963349329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2834352, while the sum is 52.

The spelling of 31963349329 in words is "thirty-one billion, nine hundred sixty-three million, three hundred forty-nine thousand, three hundred twenty-nine".