13087987 has 8 divisors (see below), whose sum is σ = 14339952. Its totient is φ = 11846400.

The previous prime is 13087967. The next prime is 13087993. The reversal of 13087987 is 78978031.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13087987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13087937) 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, 183 + ... + 5119.

It is an arithmetic number, because the mean of its divisors is an integer number (1792494).

Almost surely, 2^13087987 is an apocalyptic number.

13087987 is a deficient number, since it is larger than the sum of its proper divisors (1251965).

13087987 is a wasteful number, since it uses less digits than its factorization.

13087987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5189.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 13087987 is about 3617.7323007652. The cubic root of 13087987 is about 235.6627556429.

The spelling of 13087987 in words is "thirteen million, eighty-seven thousand, nine hundred eighty-seven".