13775209 has 8 divisors (see below), whose sum is σ = 16571840. Its totient is φ = 11185776.

The previous prime is 13775197. The next prime is 13775233. The reversal of 13775209 is 90257731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13775209 - 2⁹ = 13774697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13775249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51654 + ... + 51919.

It is an arithmetic number, because the mean of its divisors is an integer number (2071480).

Almost surely, 2^13775209 is an apocalyptic number.

13775209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13775209 is a deficient number, since it is larger than the sum of its proper divisors (2796631).

13775209 is a wasteful number, since it uses less digits than its factorization.

13775209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103599.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 13775209 is about 3711.4968678419. The cubic root of 13775209 is about 239.7173118375.

The spelling of 13775209 in words is "thirteen million, seven hundred seventy-five thousand, two hundred nine".