13809097 has 4 divisors (see below), whose sum is σ = 14069700. Its totient is φ = 13548496.

The previous prime is 13809073. The next prime is 13809113. The reversal of 13809097 is 79090831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79090831 = 61 ⋅1296571.

It can be written as a sum of positive squares in 2 ways, for example, as 9884736 + 3924361 = 3144^2 + 1981^2 .

It is not a de Polignac number, because 13809097 - 2⁷ = 13808969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13800097) 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, 130222 + ... + 130327.

It is an arithmetic number, because the mean of its divisors is an integer number (3517425).

Almost surely, 2^13809097 is an apocalyptic number.

It is an amenable number.

13809097 is a deficient number, since it is larger than the sum of its proper divisors (260603).

13809097 is an equidigital number, since it uses as much as digits as its factorization.

13809097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260602.

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

The square root of 13809097 is about 3716.0593375241. The cubic root of 13809097 is about 239.9137247765.

The spelling of 13809097 in words is "thirteen million, eight hundred nine thousand, ninety-seven".