16589987 has 4 divisors (see below), whose sum is σ = 16862016. Its totient is φ = 16317960.

The previous prime is 16589981. The next prime is 16589999. The reversal of 16589987 is 78998561.

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 16589987 - 2¹⁴ = 16573603 is a prime.

It is a super-3 number, since 3×16589987³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16589981) 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, 135923 + ... + 136044.

It is an arithmetic number, because the mean of its divisors is an integer number (4215504).

Almost surely, 2^16589987 is an apocalyptic number.

16589987 is a deficient number, since it is larger than the sum of its proper divisors (272029).

16589987 is an equidigital number, since it uses as much as digits as its factorization.

16589987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272028.

The product of its digits is 1088640, while the sum is 53.

The square root of 16589987 is about 4073.0807750399. The cubic root of 16589987 is about 255.0441394821.

It can be divided in two parts, 16589 and 987, that added together give a cube (17576 = 26³).

The spelling of 16589987 in words is "sixteen million, five hundred eighty-nine thousand, nine hundred eighty-seven".