158623 has 4 divisors (see below), whose sum is σ = 160000. Its totient is φ = 157248.

The previous prime is 158621. The next prime is 158633. The reversal of 158623 is 326851.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 158623 - 2¹ = 158621 is a prime.

It is a super-2 number, since 2×158623² = 50322512258, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158621) 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, 498 + ... + 751.

It is an arithmetic number, because the mean of its divisors is an integer number (40000).

2¹⁵⁸⁶²³ is an apocalyptic number.

158623 is a deficient number, since it is larger than the sum of its proper divisors (1377).

158623 is a wasteful number, since it uses less digits than its factorization.

158623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376.

The product of its digits is 1440, while the sum is 25.

The square root of 158623 is about 398.2750306007. The cubic root of 158623 is about 54.1321636944.

It can be divided in two parts, 15862 and 3, that multiplied together give a triangular number (47586 = T₃₀₈).

The spelling of 158623 in words is "one hundred fifty-eight thousand, six hundred twenty-three".