31814108693 has 2 divisors, whose sum is σ = 31814108694. Its totient is φ = 31814108692.

The previous prime is 31814108659. The next prime is 31814108743. The reversal of 31814108693 is 39680141813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30101556004 + 1712552689 = 173498^2 + 41383^2 .

It is a cyclic number.

It is not a de Polignac number, because 31814108693 - 2¹⁸ = 31813846549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31814108603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15907054346 + 15907054347.

It is an arithmetic number, because the mean of its divisors is an integer number (15907054347).

Almost surely, 2^31814108693 is an apocalyptic number.

It is an amenable number.

31814108693 is a deficient number, since it is larger than the sum of its proper divisors (1).

31814108693 is an equidigital number, since it uses as much as digits as its factorization.

31814108693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 31814108693 in words is "thirty-one billion, eight hundred fourteen million, one hundred eight thousand, six hundred ninety-three".