13838949 has 6 divisors (see below), whose sum is σ = 19989606. Its totient is φ = 9225960.

The previous prime is 13838947. The next prime is 13838953. The reversal of 13838949 is 94983831.

13838949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9108324 + 4730625 = 3018^2 + 2175^2 .

It is not a de Polignac number, because 13838949 - 2¹ = 13838947 is a prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13838941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 768822 + ... + 768839.

It is an arithmetic number, because the mean of its divisors is an integer number (3331601).

Almost surely, 2^13838949 is an apocalyptic number.

It is an amenable number.

13838949 is a deficient number, since it is larger than the sum of its proper divisors (6150657).

13838949 is a wasteful number, since it uses less digits than its factorization.

13838949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537667 (or 1537664 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 13838949 is about 3720.0737895907. The cubic root of 13838949 is about 240.0864792518.

The spelling of 13838949 in words is "thirteen million, eight hundred thirty-eight thousand, nine hundred forty-nine".