13263491 has 2 divisors, whose sum is σ = 13263492. Its totient is φ = 13263490.

The previous prime is 13263487. The next prime is 13263493. The reversal of 13263491 is 19436231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13263491 - 2² = 13263487 is a prime.

Together with 13263493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13263493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6631745 + 6631746.

It is an arithmetic number, because the mean of its divisors is an integer number (6631746).

Almost surely, 2^13263491 is an apocalyptic number.

13263491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13263491 is an equidigital number, since it uses as much as digits as its factorization.

13263491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 13263491 is about 3641.9076045391. The cubic root of 13263491 is about 236.7114590438.

The spelling of 13263491 in words is "thirteen million, two hundred sixty-three thousand, four hundred ninety-one".