13849987 has 4 divisors (see below), whose sum is σ = 13904136. Its totient is φ = 13795840.

The previous prime is 13849943. The next prime is 13849991. The reversal of 13849987 is 78994831.

It is a happy number.

13849987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13849987 - 2⁷ = 13849859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13849987.

It is not an unprimeable number, because it can be changed into a prime (13849387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26689 + ... + 27202.

It is an arithmetic number, because the mean of its divisors is an integer number (3476034).

Almost surely, 2^13849987 is an apocalyptic number.

13849987 is a deficient number, since it is larger than the sum of its proper divisors (54149).

13849987 is an equidigital number, since it uses as much as digits as its factorization.

13849987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54148.

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

The square root of 13849987 is about 3721.5570666053. The cubic root of 13849987 is about 240.1502935945.

The spelling of 13849987 in words is "thirteen million, eight hundred forty-nine thousand, nine hundred eighty-seven".