144775509 has 16 divisors (see below), whose sum is σ = 197487360. Its totient is φ = 94311360.

The previous prime is 144775483. The next prime is 144775523. The reversal of 144775509 is 905577441.

It is a happy number.

It is not a de Polignac number, because 144775509 - 2⁹ = 144774997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144775529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26212 + ... + 31250.

It is an arithmetic number, because the mean of its divisors is an integer number (12342960).

Almost surely, 2^144775509 is an apocalyptic number.

It is an amenable number.

144775509 is a deficient number, since it is larger than the sum of its proper divisors (52711851).

144775509 is a wasteful number, since it uses less digits than its factorization.

144775509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260.

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 144775509 is about 12032.2694866762. The cubic root of 144775509 is about 525.0875246367.

The spelling of 144775509 in words is "one hundred forty-four million, seven hundred seventy-five thousand, five hundred nine".