158693 has 4 divisors (see below), whose sum is σ = 163020. Its totient is φ = 154368.

The previous prime is 158663. The next prime is 158699. The reversal of 158693 is 396851.

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

It can be written as a sum of positive squares in 2 ways, for example, as 145924 + 12769 = 382^2 + 113^2 .

It is a cyclic number.

It is not a de Polignac number, because 158693 - 2¹⁰ = 157669 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 (158699) 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, 2108 + ... + 2181.

It is an arithmetic number, because the mean of its divisors is an integer number (40755).

2¹⁵⁸⁶⁹³ is an apocalyptic number.

It is an amenable number.

158693 is a deficient number, since it is larger than the sum of its proper divisors (4327).

158693 is an equidigital number, since it uses as much as digits as its factorization.

158693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326.

The product of its digits is 6480, while the sum is 32.

The square root of 158693 is about 398.3628998790. The cubic root of 158693 is about 54.1401253271.

The spelling of 158693 in words is "one hundred fifty-eight thousand, six hundred ninety-three".