13823409 has 4 divisors (see below), whose sum is σ = 18431216. Its totient is φ = 9215604.

The previous prime is 13823387. The next prime is 13823417. The reversal of 13823409 is 90432831.

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 not a de Polignac number, because 13823409 - 2⁵ = 13823377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13823429) 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, 2303899 + ... + 2303904.

It is an arithmetic number, because the mean of its divisors is an integer number (4607804).

Almost surely, 2^13823409 is an apocalyptic number.

It is an amenable number.

13823409 is a deficient number, since it is larger than the sum of its proper divisors (4607807).

13823409 is an equidigital number, since it uses as much as digits as its factorization.

13823409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607806.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 13823409 is about 3717.9845346639. The cubic root of 13823409 is about 239.9965798124.

The spelling of 13823409 in words is "thirteen million, eight hundred twenty-three thousand, four hundred nine".