31374665893 has 2 divisors, whose sum is σ = 31374665894. Its totient is φ = 31374665892.

The previous prime is 31374665879. The next prime is 31374665981. The reversal of 31374665893 is 39856647313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30248862084 + 1125803809 = 173922^2 + 33553^2 .

It is a cyclic number.

It is not a de Polignac number, because 31374665893 - 2²¹ = 31372568741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31374665863) 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, 15687332946 + 15687332947.

It is an arithmetic number, because the mean of its divisors is an integer number (15687332947).

Almost surely, 2^31374665893 is an apocalyptic number.

It is an amenable number.

31374665893 is a deficient number, since it is larger than the sum of its proper divisors (1).

31374665893 is an equidigital number, since it uses as much as digits as its factorization.

31374665893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9797760, while the sum is 55.

The spelling of 31374665893 in words is "thirty-one billion, three hundred seventy-four million, six hundred sixty-five thousand, eight hundred ninety-three".