158423 has 4 divisors (see below), whose sum is σ = 167760. Its totient is φ = 149088.

The previous prime is 158419. The next prime is 158429. The reversal of 158423 is 324851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324851 = 563 ⋅577.

It is a cyclic number.

It is not a de Polignac number, because 158423 - 2² = 158419 is a prime.

It is a d-powerful number, because it can be written as 1 + 5⁷ + 4⁸ + 8 + 2¹³ + 3⁸ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4643 + ... + 4676.

It is an arithmetic number, because the mean of its divisors is an integer number (41940).

2¹⁵⁸⁴²³ is an apocalyptic number.

158423 is a deficient number, since it is larger than the sum of its proper divisors (9337).

158423 is an equidigital number, since it uses as much as digits as its factorization.

158423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9336.

The product of its digits is 960, while the sum is 23.

The square root of 158423 is about 398.0238686310. The cubic root of 158423 is about 54.1094032580.

The spelling of 158423 in words is "one hundred fifty-eight thousand, four hundred twenty-three".