150809 has 4 divisors (see below), whose sum is σ = 151680. Its totient is φ = 149940.

The previous prime is 150797. The next prime is 150827. The reversal of 150809 is 908051.

150809 is nontrivially palindromic in base 11.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 908051 = 67 ⋅13553.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-150809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (150869) 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, 77 + ... + 554.

It is an arithmetic number, because the mean of its divisors is an integer number (37920).

2¹⁵⁰⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

150809 is a deficient number, since it is larger than the sum of its proper divisors (871).

150809 is an equidigital number, since it uses as much as digits as its factorization.

150809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 150809 is about 388.3413446956. The cubic root of 150809 is about 53.2282784440.

It can be divided in two parts, 150 and 809, that added together give a palindrome (959).

The spelling of 150809 in words is "one hundred fifty thousand, eight hundred nine".