13620091 has 4 divisors (see below), whose sum is σ = 13851000. Its totient is φ = 13389184.

The previous prime is 13620073. The next prime is 13620119. The reversal of 13620091 is 19002631.

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 13620091 - 2⁵ = 13620059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13620011) 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, 115366 + ... + 115483.

It is an arithmetic number, because the mean of its divisors is an integer number (3462750).

Almost surely, 2^13620091 is an apocalyptic number.

13620091 is a deficient number, since it is larger than the sum of its proper divisors (230909).

13620091 is an equidigital number, since it uses as much as digits as its factorization.

13620091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230908.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 13620091 is about 3690.5407462864. The cubic root of 13620091 is about 238.8141210960.

The spelling of 13620091 in words is "thirteen million, six hundred twenty thousand, ninety-one".