13840823 has 4 divisors (see below), whose sum is σ = 13856928. Its totient is φ = 13824720.

The previous prime is 13840807. The next prime is 13840829. The reversal of 13840823 is 32804831.

It is a happy number.

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 13840823 - 2⁴ = 13840807 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 (13840829) 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, 6686 + ... + 8507.

It is an arithmetic number, because the mean of its divisors is an integer number (3464232).

Almost surely, 2^13840823 is an apocalyptic number.

13840823 is a deficient number, since it is larger than the sum of its proper divisors (16105).

13840823 is an equidigital number, since it uses as much as digits as its factorization.

13840823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16104.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 13840823 is about 3720.3256577886. The cubic root of 13840823 is about 240.0973158588.

The spelling of 13840823 in words is "thirteen million, eight hundred forty thousand, eight hundred twenty-three".