13809253 has 4 divisors (see below), whose sum is σ = 14621580. Its totient is φ = 12996928.

The previous prime is 13809227. The next prime is 13809277. The reversal of 13809253 is 35290831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7059649 + 6749604 = 2657^2 + 2598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13809253 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809283) 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, 406138 + ... + 406171.

It is an arithmetic number, because the mean of its divisors is an integer number (3655395).

Almost surely, 2^13809253 is an apocalyptic number.

It is an amenable number.

13809253 is a deficient number, since it is larger than the sum of its proper divisors (812327).

13809253 is an equidigital number, since it uses as much as digits as its factorization.

13809253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812326.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 13809253 is about 3716.0803274418. The cubic root of 13809253 is about 239.9146282003.

The spelling of 13809253 in words is "thirteen million, eight hundred nine thousand, two hundred fifty-three".