13551909 has 8 divisors (see below), whose sum is σ = 20650560. Its totient is φ = 7743936.

The previous prime is 13551869. The next prime is 13551913. The reversal of 13551909 is 90915531.

13551909 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13551909 - 2¹² = 13547813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13551909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13551919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322644 + ... + 322685.

It is an arithmetic number, because the mean of its divisors is an integer number (2581320).

Almost surely, 2^13551909 is an apocalyptic number.

It is an amenable number.

13551909 is a deficient number, since it is larger than the sum of its proper divisors (7098651).

13551909 is an equidigital number, since it uses as much as digits as its factorization.

13551909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645339.

The product of its (nonzero) digits is 6075, while the sum is 33.

The square root of 13551909 is about 3681.2917569788. The cubic root of 13551909 is about 238.4149541409.

The spelling of 13551909 in words is "thirteen million, five hundred fifty-one thousand, nine hundred nine".