13246991 has 2 divisors, whose sum is σ = 13246992. Its totient is φ = 13246990.

The previous prime is 13246973. The next prime is 13247023. The reversal of 13246991 is 19964231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13246991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13246931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6623495 + 6623496.

It is an arithmetic number, because the mean of its divisors is an integer number (6623496).

Almost surely, 2^13246991 is an apocalyptic number.

13246991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13246991 is an equidigital number, since it uses as much as digits as its factorization.

13246991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 13246991 is about 3639.6416032351. The cubic root of 13246991 is about 236.6132606686.

The spelling of 13246991 in words is "thirteen million, two hundred forty-six thousand, nine hundred ninety-one".