158789 has 4 divisors (see below), whose sum is σ = 160524. Its totient is φ = 157056.

The previous prime is 158777. The next prime is 158791. The reversal of 158789 is 987851.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30625 + 128164 = 175^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 158789 - 2¹⁶ = 93253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158749) 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, 722 + ... + 915.

It is an arithmetic number, because the mean of its divisors is an integer number (40131).

2¹⁵⁸⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

158789 is a deficient number, since it is larger than the sum of its proper divisors (1735).

158789 is an equidigital number, since it uses as much as digits as its factorization.

158789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734.

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

The square root of 158789 is about 398.4833748100. The cubic root of 158789 is about 54.1510403314.

The spelling of 158789 in words is "one hundred fifty-eight thousand, seven hundred eighty-nine".