13809923 has 8 divisors (see below), whose sum is σ = 14187888. Its totient is φ = 13434624.

The previous prime is 13809919. The next prime is 13809937. The reversal of 13809923 is 32990831.

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 13809923 - 2² = 13809919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13809823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14015 + ... + 14967.

It is an arithmetic number, because the mean of its divisors is an integer number (1773486).

Almost surely, 2^13809923 is an apocalyptic number.

13809923 is a deficient number, since it is larger than the sum of its proper divisors (377965).

13809923 is an equidigital number, since it uses as much as digits as its factorization.

13809923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 13809923 is about 3716.1704750993. The cubic root of 13809923 is about 239.9185082123.

The spelling of 13809923 in words is "thirteen million, eight hundred nine thousand, nine hundred twenty-three".