158813 has 8 divisors (see below), whose sum is σ = 168960. Its totient is φ = 149040.

The previous prime is 158803. The next prime is 158843. The reversal of 158813 is 318851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158813 - 2⁶ = 158749 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1403 + ... + 1511.

It is an arithmetic number, because the mean of its divisors is an integer number (21120).

2¹⁵⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

158813 is a deficient number, since it is larger than the sum of its proper divisors (10147).

158813 is a wasteful number, since it uses less digits than its factorization.

158813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187.

The product of its digits is 960, while the sum is 26.

The square root of 158813 is about 398.5134878520. The cubic root of 158813 is about 54.1537683950.

The spelling of 158813 in words is "one hundred fifty-eight thousand, eight hundred thirteen".