158459909 has 4 divisors (see below), whose sum is σ = 158620800. Its totient is φ = 158299020.

The previous prime is 158459893. The next prime is 158459911. The reversal of 158459909 is 909954851.

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, and also an emirpimes, since its reverse is a distinct semiprime: 909954851 = 13 ⋅69996527.

It is a cyclic number.

It is not a de Polignac number, because 158459909 - 2⁴ = 158459893 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 (158459969) 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, 78959 + ... + 80940.

It is an arithmetic number, because the mean of its divisors is an integer number (39655200).

Almost surely, 2^158459909 is an apocalyptic number.

It is an amenable number.

158459909 is a deficient number, since it is larger than the sum of its proper divisors (160891).

158459909 is an equidigital number, since it uses as much as digits as its factorization.

158459909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160890.

The product of its (nonzero) digits is 583200, while the sum is 50.

The square root of 158459909 is about 12588.0859943043. The cubic root of 158459909 is about 541.1360502348.

The spelling of 158459909 in words is "one hundred fifty-eight million, four hundred fifty-nine thousand, nine hundred nine".