13641909 has 4 divisors (see below), whose sum is σ = 18189216. Its totient is φ = 9094604.

The previous prime is 13641893. The next prime is 13641911. The reversal of 13641909 is 90914631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13641909 - 2⁴ = 13641893 is a prime.

It is a super-2 number, since 2×13641909² = 372203362328562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13641909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13641949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2273649 + ... + 2273654.

It is an arithmetic number, because the mean of its divisors is an integer number (4547304).

Almost surely, 2^13641909 is an apocalyptic number.

It is an amenable number.

13641909 is a deficient number, since it is larger than the sum of its proper divisors (4547307).

13641909 is an equidigital number, since it uses as much as digits as its factorization.

13641909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547306.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 13641909 is about 3693.4954988466. The cubic root of 13641909 is about 238.9415717072.

The spelling of 13641909 in words is "thirteen million, six hundred forty-one thousand, nine hundred nine".