13939945 has 8 divisors (see below), whose sum is σ = 16940160. Its totient is φ = 11010480.

The previous prime is 13939943. The next prime is 13939951. The reversal of 13939945 is 54993931.

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

It is not a de Polignac number, because 13939945 - 2¹ = 13939943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13939943) 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 7 ways as a sum of consecutive naturals, for example, 17251 + ... + 18040.

It is an arithmetic number, because the mean of its divisors is an integer number (2117520).

Almost surely, 2^13939945 is an apocalyptic number.

It is an amenable number.

13939945 is a deficient number, since it is larger than the sum of its proper divisors (3000215).

13939945 is an equidigital number, since it uses as much as digits as its factorization.

13939945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35375.

The product of its digits is 131220, while the sum is 43.

The square root of 13939945 is about 3733.6235750273. The cubic root of 13939945 is about 240.6691108203.

It can be divided in two parts, 13939 and 945, that added together give a square (14884 = 122²).

The spelling of 13939945 in words is "thirteen million, nine hundred thirty-nine thousand, nine hundred forty-five".