13887949 has 6 divisors (see below), whose sum is σ = 14015274. Its totient is φ = 13761360.

The previous prime is 13887943. The next prime is 13887953. The reversal of 13887949 is 94978831.

It is a happy number.

13887949 is digitally balanced in base 3, 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 3 ways, for example, as 1249924 + 12638025 = 1118^2 + 3555^2 .

It is not a de Polignac number, because 13887949 - 2³ = 13887941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887941) 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, 49999 + ... + 50275.

It is an arithmetic number, because the mean of its divisors is an integer number (2335879).

Almost surely, 2^13887949 is an apocalyptic number.

It is an amenable number.

13887949 is a deficient number, since it is larger than the sum of its proper divisors (127325).

13887949 is an frugal number, since it uses more digits than its factorization.

13887949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 458 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 13887949 is about 3726.6538610394. The cubic root of 13887949 is about 240.3695060449.

The spelling of 13887949 in words is "thirteen million, eight hundred eighty-seven thousand, nine hundred forty-nine".