31663190329 has 2 divisors, whose sum is σ = 31663190330. Its totient is φ = 31663190328.

The previous prime is 31663190323. The next prime is 31663190399. The reversal of 31663190329 is 92309136613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27975907600 + 3687282729 = 167260^2 + 60723^2 .

It is a cyclic number.

It is not a de Polignac number, because 31663190329 - 2¹¹ = 31663188281 is a prime.

It is not a weakly prime, because it can be changed into another prime (31663190323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15831595164 + 15831595165.

It is an arithmetic number, because the mean of its divisors is an integer number (15831595165).

Almost surely, 2^31663190329 is an apocalyptic number.

It is an amenable number.

31663190329 is a deficient number, since it is larger than the sum of its proper divisors (1).

31663190329 is an equidigital number, since it uses as much as digits as its factorization.

31663190329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 43.

The spelling of 31663190329 in words is "thirty-one billion, six hundred sixty-three million, one hundred ninety thousand, three hundred twenty-nine".