13938649 has 8 divisors (see below), whose sum is σ = 14439168. Its totient is φ = 13446720.

The previous prime is 13938581. The next prime is 13938671. The reversal of 13938649 is 94683931.

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 13938649 - 2⁹ = 13938137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13938679) 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, 1249 + ... + 5425.

It is an arithmetic number, because the mean of its divisors is an integer number (1804896).

Almost surely, 2^13938649 is an apocalyptic number.

It is an amenable number.

13938649 is a deficient number, since it is larger than the sum of its proper divisors (500519).

13938649 is an equidigital number, since it uses as much as digits as its factorization.

13938649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295.

The product of its digits is 139968, while the sum is 43.

The square root of 13938649 is about 3733.4500130576. The cubic root of 13938649 is about 240.6616522343.

The spelling of 13938649 in words is "thirteen million, nine hundred thirty-eight thousand, six hundred forty-nine".