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BaseRepresentation
bin100110101011010111
322001022112
4212223113
520032143
63221235
71226606
oct465327
9261275
10158423
11a9031
127781b
1357155
1441a3d
1531e18

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 = 563577.

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".

Divisors: 1 17 9319 158423