158911 has 4 divisors (see below), whose sum is σ = 159712. Its totient is φ = 158112.

The previous prime is 158909. The next prime is 158923. The reversal of 158911 is 119851.

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 a cyclic number.

It is not a de Polignac number, because 158911 - 2¹ = 158909 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 (158941) 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, 151 + ... + 583.

It is an arithmetic number, because the mean of its divisors is an integer number (39928).

2¹⁵⁸⁹¹¹ is an apocalyptic number.

158911 is a deficient number, since it is larger than the sum of its proper divisors (801).

158911 is an equidigital number, since it uses as much as digits as its factorization.

158911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its digits is 360, while the sum is 25.

The square root of 158911 is about 398.6364258319. The cubic root of 158911 is about 54.1649051367.

Subtracting from 158911 its reverse (119851), we obtain a triangular number (39060 = T₂₇₉).

It can be divided in two parts, 1589 and 11, that added together give a square (1600 = 40²).

The spelling of 158911 in words is "one hundred fifty-eight thousand, nine hundred eleven".