31364440193 has 2 divisors, whose sum is σ = 31364440194. Its totient is φ = 31364440192.

The previous prime is 31364440141. The next prime is 31364440259. The reversal of 31364440193 is 39104446313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27991966864 + 3372473329 = 167308^2 + 58073^2 .

It is an emirp because it is prime and its reverse (39104446313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31364440193 - 2²⁴ = 31347662977 is a prime.

It is not a weakly prime, because it can be changed into another prime (31364440693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15682220096 + 15682220097.

It is an arithmetic number, because the mean of its divisors is an integer number (15682220097).

Almost surely, 2^31364440193 is an apocalyptic number.

It is an amenable number.

31364440193 is a deficient number, since it is larger than the sum of its proper divisors (1).

31364440193 is an equidigital number, since it uses as much as digits as its factorization.

31364440193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 31364440193 in words is "thirty-one billion, three hundred sixty-four million, four hundred forty thousand, one hundred ninety-three".