13299991 has 2 divisors, whose sum is σ = 13299992.
Its totient is φ = 13299990.
The previous prime is 13299989. The next prime is 13300039. The reversal of 13299991 is 19999231.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 13299991 - 21 = 13299989 is a prime.
Together with 13299989, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (13299931) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6649995 + 6649996.
It is an arithmetic number, because the mean of its divisors is an integer number (6649996).
Almost surely, 213299991 is an apocalyptic number.
13299991 is a deficient number, since it is larger than the sum of its proper divisors (1).
13299991 is an equidigital number, since it uses as much as digits as its factorization.
13299991 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 39366, while the sum is 43.
The square root of 13299991 is about 3646.9152718428.
The cubic root of 13299991 is about 236.9283967732.
The spelling of 13299991 in words is "thirteen million, two hundred ninety-nine thousand, nine hundred ninety-one".