144585409 has 2 divisors, whose sum is σ = 144585410. Its totient is φ = 144585408.

The previous prime is 144585407. The next prime is 144585443. The reversal of 144585409 is 904585441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104857600 + 39727809 = 10240^2 + 6303^2 .

It is a cyclic number.

It is not a de Polignac number, because 144585409 - 2¹ = 144585407 is a prime.

Together with 144585407, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144585403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72292704 + 72292705.

It is an arithmetic number, because the mean of its divisors is an integer number (72292705).

Almost surely, 2^144585409 is an apocalyptic number.

It is an amenable number.

144585409 is a deficient number, since it is larger than the sum of its proper divisors (1).

144585409 is an equidigital number, since it uses as much as digits as its factorization.

144585409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 144585409 is about 12024.3673014425. The cubic root of 144585409 is about 524.8575988691.

The spelling of 144585409 in words is "one hundred forty-four million, five hundred eighty-five thousand, four hundred nine".