31830486893 has 2 divisors, whose sum is σ = 31830486894. Its totient is φ = 31830486892.

The previous prime is 31830486731. The next prime is 31830486901. The reversal of 31830486893 is 39868403813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22881705289 + 8948781604 = 151267^2 + 94598^2 .

It is a cyclic number.

It is not a de Polignac number, because 31830486893 - 2¹⁸ = 31830224749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31830476893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15915243446 + 15915243447.

It is an arithmetic number, because the mean of its divisors is an integer number (15915243447).

Almost surely, 2^31830486893 is an apocalyptic number.

It is an amenable number.

31830486893 is a deficient number, since it is larger than the sum of its proper divisors (1).

31830486893 is an equidigital number, since it uses as much as digits as its factorization.

31830486893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 31830486893 in words is "thirty-one billion, eight hundred thirty million, four hundred eighty-six thousand, eight hundred ninety-three".