13987149 has 8 divisors (see below), whose sum is σ = 20344992. Its totient is φ = 8477040.

The previous prime is 13987139. The next prime is 13987217. The reversal of 13987149 is 94178931.

It is a happy number.

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

It is not a de Polignac number, because 13987149 - 2⁸ = 13986893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13987149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13987139) 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, 211894 + ... + 211959.

It is an arithmetic number, because the mean of its divisors is an integer number (2543124).

Almost surely, 2^13987149 is an apocalyptic number.

It is an amenable number.

13987149 is a deficient number, since it is larger than the sum of its proper divisors (6357843).

13987149 is a wasteful number, since it uses less digits than its factorization.

13987149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423867.

The product of its digits is 54432, while the sum is 42.

The square root of 13987149 is about 3739.9397053963. The cubic root of 13987149 is about 240.9404592271.

The spelling of 13987149 in words is "thirteen million, nine hundred eighty-seven thousand, one hundred forty-nine".