13059987 has 4 divisors (see below), whose sum is σ = 17413320. Its totient is φ = 8706656.

The previous prime is 13059971. The next prime is 13059989. The reversal of 13059987 is 78995031.

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 13059987 - 2⁴ = 13059971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13059989) 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, 2176662 + ... + 2176667.

It is an arithmetic number, because the mean of its divisors is an integer number (4353330).

Almost surely, 2^13059987 is an apocalyptic number.

13059987 is a deficient number, since it is larger than the sum of its proper divisors (4353333).

13059987 is an equidigital number, since it uses as much as digits as its factorization.

13059987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4353332.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 13059987 is about 3613.8604012884. The cubic root of 13059987 is about 235.4945793263.

The spelling of 13059987 in words is "thirteen million, fifty-nine thousand, nine hundred eighty-seven".