154009 has 4 divisors (see below), whose sum is σ = 154804. Its totient is φ = 153216.

The previous prime is 154001. The next prime is 154027. The reversal of 154009 is 900451.

154009 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 900451 = 97 ⋅9283.

It can be written as a sum of positive squares in 2 ways, for example, as 90000 + 64009 = 300^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 154009 - 2³ = 154001 is a prime.

It is a Duffinian number.

154009 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154001) 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, 109 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (38701).

2¹⁵⁴⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

154009 is a deficient number, since it is larger than the sum of its proper divisors (795).

154009 is an equidigital number, since it uses as much as digits as its factorization.

154009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 154009 is about 392.4398043012. The cubic root of 154009 is about 53.6021282663.

The spelling of 154009 in words is "one hundred fifty-four thousand, nine".