12699588917 has 2 divisors, whose sum is σ = 12699588918. Its totient is φ = 12699588916.

The previous prime is 12699588899. The next prime is 12699588919. The reversal of 12699588917 is 71988599621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7325819281 + 5373769636 = 85591^2 + 73306^2 .

It is a cyclic number.

It is not a de Polignac number, because 12699588917 - 2¹⁴ = 12699572533 is a prime.

It is a super-2 number, since 2×12699588917² (a number of 21 digits) contains 22 as substring.

Together with 12699588919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12699588919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6349794458 + 6349794459.

It is an arithmetic number, because the mean of its divisors is an integer number (6349794459).

Almost surely, 2^12699588917 is an apocalyptic number.

It is an amenable number.

12699588917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12699588917 is an equidigital number, since it uses as much as digits as its factorization.

12699588917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 65.

The spelling of 12699588917 in words is "twelve billion, six hundred ninety-nine million, five hundred eighty-eight thousand, nine hundred seventeen".