158309 has 4 divisors (see below), whose sum is σ = 165216. Its totient is φ = 151404.

The previous prime is 158303. The next prime is 158329. The reversal of 158309 is 903851.

158309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158309 - 2⁴ = 158293 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 (158303) 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, 3419 + ... + 3464.

It is an arithmetic number, because the mean of its divisors is an integer number (41304).

2¹⁵⁸³⁰⁹ is an apocalyptic number.

It is an amenable number.

158309 is a deficient number, since it is larger than the sum of its proper divisors (6907).

158309 is an equidigital number, since it uses as much as digits as its factorization.

158309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6906.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 158309 is about 397.8806353669. The cubic root of 158309 is about 54.0964212369.

The spelling of 158309 in words is "one hundred fifty-eight thousand, three hundred nine".