13855009 has 8 divisors (see below), whose sum is σ = 16667840. Its totient is φ = 11250576.

The previous prime is 13855003. The next prime is 13855019. The reversal of 13855009 is 90055831.

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

It is a cyclic number.

It is not a de Polignac number, because 13855009 - 2³ = 13855001 is a prime.

It is a super-2 number, since 2×13855009² = 383922548780162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13855001) 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, 51954 + ... + 52219.

It is an arithmetic number, because the mean of its divisors is an integer number (2083480).

Almost surely, 2^13855009 is an apocalyptic number.

13855009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13855009 is a deficient number, since it is larger than the sum of its proper divisors (2812831).

13855009 is a wasteful number, since it uses less digits than its factorization.

13855009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104199.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 13855009 is about 3722.2317230393. The cubic root of 13855009 is about 240.1793162218.

The spelling of 13855009 in words is "thirteen million, eight hundred fifty-five thousand, nine".