13552809 has 4 divisors (see below), whose sum is σ = 18070416. Its totient is φ = 9035204.

The previous prime is 13552793. The next prime is 13552811. The reversal of 13552809 is 90825531.

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: 90825531 = 3 ⋅30275177.

It is a cyclic number.

It is not a de Polignac number, because 13552809 - 2⁴ = 13552793 is a prime.

It is a super-3 number, since 3×13552809³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13552809.

It is not an unprimeable number, because it can be changed into a prime (13552829) 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, 2258799 + ... + 2258804.

It is an arithmetic number, because the mean of its divisors is an integer number (4517604).

Almost surely, 2^13552809 is an apocalyptic number.

It is an amenable number.

13552809 is a deficient number, since it is larger than the sum of its proper divisors (4517607).

13552809 is an equidigital number, since it uses as much as digits as its factorization.

13552809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517606.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 13552809 is about 3681.4139946493. The cubic root of 13552809 is about 238.4202318404.

The spelling of 13552809 in words is "thirteen million, five hundred fifty-two thousand, eight hundred nine".