13668694997 has 2 divisors, whose sum is σ = 13668694998. Its totient is φ = 13668694996.

The previous prime is 13668694967. The next prime is 13668695003. The reversal of 13668694997 is 79949686631.

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., 12935422756 + 733272241 = 113734^2 + 27079^2 .

It is a cyclic number.

It is not a de Polignac number, because 13668694997 - 2¹⁸ = 13668432853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13668694927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6834347498 + 6834347499.

It is an arithmetic number, because the mean of its divisors is an integer number (6834347499).

Almost surely, 2^13668694997 is an apocalyptic number.

It is an amenable number.

13668694997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13668694997 is an equidigital number, since it uses as much as digits as its factorization.

13668694997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105815808, while the sum is 68.

The spelling of 13668694997 in words is "thirteen billion, six hundred sixty-eight million, six hundred ninety-four thousand, nine hundred ninety-seven".