158969 has 4 divisors (see below), whose sum is σ = 161280. Its totient is φ = 156660.

The previous prime is 158959. The next prime is 158981. The reversal of 158969 is 969851.

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 158969 - 2¹² = 154873 is a prime.

It is a super-2 number, since 2×158969² = 50542285922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158909) 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, 1049 + ... + 1190.

It is an arithmetic number, because the mean of its divisors is an integer number (40320).

2¹⁵⁸⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

158969 is a deficient number, since it is larger than the sum of its proper divisors (2311).

158969 is an equidigital number, since it uses as much as digits as its factorization.

158969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310.

The product of its digits is 19440, while the sum is 38.

The square root of 158969 is about 398.7091671883. The cubic root of 158969 is about 54.1714941128.

The spelling of 158969 in words is "one hundred fifty-eight thousand, nine hundred sixty-nine".