144605009 has 8 divisors (see below), whose sum is σ = 153556200. Its totient is φ = 135703296.

The previous prime is 144604969. The next prime is 144605017. The reversal of 144605009 is 900506441.

It can be written as a sum of positive squares in 4 ways, for example, as 41886784 + 102718225 = 6472^2 + 10135^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144605009 - 2⁸ = 144604753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144605039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6254 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (19194525).

Almost surely, 2^144605009 is an apocalyptic number.

It is an amenable number.

144605009 is a deficient number, since it is larger than the sum of its proper divisors (8951191).

144605009 is a wasteful number, since it uses less digits than its factorization.

144605009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24739.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 144605009 is about 12025.1822855207. The cubic root of 144605009 is about 524.8813143653.

The spelling of 144605009 in words is "one hundred forty-four million, six hundred five thousand, nine".