13502987 has 4 divisors (see below), whose sum is σ = 13520256. Its totient is φ = 13485720.

The previous prime is 13502963. The next prime is 13502999. The reversal of 13502987 is 78920531.

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 13502987 - 2¹⁰ = 13501963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13502927) 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, 7403 + ... + 9044.

It is an arithmetic number, because the mean of its divisors is an integer number (3380064).

Almost surely, 2^13502987 is an apocalyptic number.

13502987 is a deficient number, since it is larger than the sum of its proper divisors (17269).

13502987 is an equidigital number, since it uses as much as digits as its factorization.

13502987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17268.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 13502987 is about 3674.6410709075. The cubic root of 13502987 is about 238.1277178592.

The spelling of 13502987 in words is "thirteen million, five hundred two thousand, nine hundred eighty-seven".