13809043 has 4 divisors (see below), whose sum is σ = 14254528. Its totient is φ = 13363560.

The previous prime is 13809031. The next prime is 13809053. The reversal of 13809043 is 34090831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34090831 = 17 ⋅2005343.

It is a cyclic number.

It is not a de Polignac number, because 13809043 - 2⁵ = 13809011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13809013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222696 + ... + 222757.

It is an arithmetic number, because the mean of its divisors is an integer number (3563632).

Almost surely, 2^13809043 is an apocalyptic number.

13809043 is a deficient number, since it is larger than the sum of its proper divisors (445485).

13809043 is an equidigital number, since it uses as much as digits as its factorization.

13809043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445484.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13809043 is about 3716.0520717557. The cubic root of 13809043 is about 239.9134120513.

Adding to 13809043 its reverse (34090831), we get a palindrome (47899874).

The spelling of 13809043 in words is "thirteen million, eight hundred nine thousand, forty-three".