14987139 has 4 divisors (see below), whose sum is σ = 19982856. Its totient is φ = 9991424.

The previous prime is 14987131. The next prime is 14987153. The reversal of 14987139 is 93178941.

It is a happy number.

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 14987139 - 2³ = 14987131 is a prime.

It is a super-2 number, since 2×14987139² = 449228670810642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 14987139.

It is not an unprimeable number, because it can be changed into a prime (14987131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2497854 + ... + 2497859.

It is an arithmetic number, because the mean of its divisors is an integer number (4995714).

Almost surely, 2^14987139 is an apocalyptic number.

14987139 is a deficient number, since it is larger than the sum of its proper divisors (4995717).

14987139 is an equidigital number, since it uses as much as digits as its factorization.

14987139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995716.

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

The square root of 14987139 is about 3871.3226421987. The cubic root of 14987139 is about 246.5507029379.

The spelling of 14987139 in words is "fourteen million, nine hundred eighty-seven thousand, one hundred thirty-nine".