13790809 has 4 divisors (see below), whose sum is σ = 13804416. Its totient is φ = 13777204.

The previous prime is 13790797. The next prime is 13790813. The reversal of 13790809 is 90809731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90809731 = 2341 ⋅38791.

It is a cyclic number.

It is not a de Polignac number, because 13790809 - 2⁹ = 13790297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13790839) 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, 5149 + ... + 7354.

It is an arithmetic number, because the mean of its divisors is an integer number (3451104).

Almost surely, 2^13790809 is an apocalyptic number.

It is an amenable number.

13790809 is a deficient number, since it is larger than the sum of its proper divisors (13607).

13790809 is a wasteful number, since it uses less digits than its factorization.

13790809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13606.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 13790809 is about 3713.5978511411. The cubic root of 13790809 is about 239.8077685242.

The spelling of 13790809 in words is "thirteen million, seven hundred ninety thousand, eight hundred nine".