13316987 has 4 divisors (see below), whose sum is σ = 13515816. Its totient is φ = 13118160.

The previous prime is 13316959. The next prime is 13316993. The reversal of 13316987 is 78961331.

13316987 is digitally balanced in base 3, 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 13316987 - 2⁸ = 13316731 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 13316987.

It is not an unprimeable number, because it can be changed into a prime (13316917) 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, 99314 + ... + 99447.

It is an arithmetic number, because the mean of its divisors is an integer number (3378954).

Almost surely, 2^13316987 is an apocalyptic number.

13316987 is a deficient number, since it is larger than the sum of its proper divisors (198829).

13316987 is an equidigital number, since it uses as much as digits as its factorization.

13316987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198828.

The product of its digits is 27216, while the sum is 38.

The square root of 13316987 is about 3649.2447163763. The cubic root of 13316987 is about 237.0292770659.

The spelling of 13316987 in words is "thirteen million, three hundred sixteen thousand, nine hundred eighty-seven".