13621493 has 8 divisors (see below), whose sum is σ = 14361600. Its totient is φ = 12900240.

The previous prime is 13621481. The next prime is 13621523. The reversal of 13621493 is 39412631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13621493 - 2⁶ = 13621429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3218 + ... + 6131.

It is an arithmetic number, because the mean of its divisors is an integer number (1795200).

Almost surely, 2^13621493 is an apocalyptic number.

It is an amenable number.

13621493 is a deficient number, since it is larger than the sum of its proper divisors (740107).

13621493 is an equidigital number, since it uses as much as digits as its factorization.

13621493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427.

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

The square root of 13621493 is about 3690.7306864630. The cubic root of 13621493 is about 238.8223150185.

The spelling of 13621493 in words is "thirteen million, six hundred twenty-one thousand, four hundred ninety-three".