13909845 has 8 divisors (see below), whose sum is σ = 22255776. Its totient is φ = 7418576.

The previous prime is 13909837. The next prime is 13909849. The reversal of 13909845 is 54890931.

13909845 is digitally balanced in base 3, because in such base 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 a cyclic number.

It is not a de Polignac number, because 13909845 - 2³ = 13909837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13909849) 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, 463647 + ... + 463676.

It is an arithmetic number, because the mean of its divisors is an integer number (2781972).

Almost surely, 2^13909845 is an apocalyptic number.

13909845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13909845 is a deficient number, since it is larger than the sum of its proper divisors (8345931).

13909845 is an equidigital number, since it uses as much as digits as its factorization.

13909845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927331.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 13909845 is about 3729.5904600908. The cubic root of 13909845 is about 240.4957634003.

The spelling of 13909845 in words is "thirteen million, nine hundred nine thousand, eight hundred forty-five".