13626491 has 4 divisors (see below), whose sum is σ = 14096400. Its totient is φ = 13156584.

The previous prime is 13626451. The next prime is 13626517. The reversal of 13626491 is 19462631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13626491 - 2¹⁰ = 13625467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13626451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234911 + ... + 234968.

It is an arithmetic number, because the mean of its divisors is an integer number (3524100).

Almost surely, 2^13626491 is an apocalyptic number.

13626491 is a deficient number, since it is larger than the sum of its proper divisors (469909).

13626491 is an equidigital number, since it uses as much as digits as its factorization.

13626491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469908.

The product of its digits is 7776, while the sum is 32.

The square root of 13626491 is about 3691.4077260579. The cubic root of 13626491 is about 238.8515210185.

The spelling of 13626491 in words is "thirteen million, six hundred twenty-six thousand, four hundred ninety-one".