11931316693 has 2 divisors, whose sum is σ = 11931316694. Its totient is φ = 11931316692.

The previous prime is 11931316687. The next prime is 11931316717. The reversal of 11931316693 is 39661313911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11371663044 + 559653649 = 106638^2 + 23657^2 .

It is a cyclic number.

It is not a de Polignac number, because 11931316693 - 2¹⁷ = 11931185621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11931316603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5965658346 + 5965658347.

It is an arithmetic number, because the mean of its divisors is an integer number (5965658347).

Almost surely, 2^11931316693 is an apocalyptic number.

It is an amenable number.

11931316693 is a deficient number, since it is larger than the sum of its proper divisors (1).

11931316693 is an equidigital number, since it uses as much as digits as its factorization.

11931316693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 43.

The spelling of 11931316693 in words is "eleven billion, nine hundred thirty-one million, three hundred sixteen thousand, six hundred ninety-three".