158917 has 4 divisors (see below), whose sum is σ = 173376. Its totient is φ = 144460.

The previous prime is 158909. The next prime is 158923. The reversal of 158917 is 719851.

158917 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 158917 - 2³ = 158909 is a prime.

It is a super-2 number, since 2×158917² = 50509225778, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158927) 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, 7213 + ... + 7234.

It is an arithmetic number, because the mean of its divisors is an integer number (43344).

2¹⁵⁸⁹¹⁷ is an apocalyptic number.

It is an amenable number.

158917 is a deficient number, since it is larger than the sum of its proper divisors (14459).

158917 is a wasteful number, since it uses less digits than its factorization.

158917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14458.

The product of its digits is 2520, while the sum is 31.

The square root of 158917 is about 398.6439514153. The cubic root of 158917 is about 54.1655868292.

The spelling of 158917 in words is "one hundred fifty-eight thousand, nine hundred seventeen".