158987 has 4 divisors (see below), whose sum is σ = 160080. Its totient is φ = 157896.

The previous prime is 158981. The next prime is 158993. The reversal of 158987 is 789851.

158987 is digitally balanced in base 2, 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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (158981) and next prime (158993).

It is a cyclic number.

It is not a de Polignac number, because 158987 - 2⁶ = 158923 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 158987.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 158987.

It is not an unprimeable number, because it can be changed into a prime (158981) 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, 287 + ... + 632.

It is an arithmetic number, because the mean of its divisors is an integer number (40020).

2¹⁵⁸⁹⁸⁷ is an apocalyptic number.

158987 is a deficient number, since it is larger than the sum of its proper divisors (1093).

158987 is an equidigital number, since it uses as much as digits as its factorization.

158987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092.

The product of its digits is 20160, while the sum is 38.

The square root of 158987 is about 398.7317393938. The cubic root of 158987 is about 54.1735386416.

The spelling of 158987 in words is "one hundred fifty-eight thousand, nine hundred eighty-seven".