13368991 has 2 divisors, whose sum is σ = 13368992. Its totient is φ = 13368990.

The previous prime is 13368947. The next prime is 13369007. The reversal of 13368991 is 19986331.

It is a strong prime.

It is an emirp because it is prime and its reverse (19986331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13368991 - 2²³ = 4980383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13368931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6684495 + 6684496.

It is an arithmetic number, because the mean of its divisors is an integer number (6684496).

Almost surely, 2^13368991 is an apocalyptic number.

13368991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13368991 is an equidigital number, since it uses as much as digits as its factorization.

13368991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 13368991 is about 3656.3630837213. The cubic root of 13368991 is about 237.3374163352.

The spelling of 13368991 in words is "thirteen million, three hundred sixty-eight thousand, nine hundred ninety-one".