144169509 has 16 divisors (see below), whose sum is σ = 213258240. Its totient is φ = 85893360.

The previous prime is 144169481. The next prime is 144169513. The reversal of 144169509 is 905961441.

144169509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 144169509 - 2²³ = 135780901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144169559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35077 + ... + 38970.

It is an arithmetic number, because the mean of its divisors is an integer number (13328640).

Almost surely, 2^144169509 is an apocalyptic number.

It is an amenable number.

144169509 is a deficient number, since it is larger than the sum of its proper divisors (69088731).

144169509 is a wasteful number, since it uses less digits than its factorization.

144169509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74120.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 144169509 is about 12007.0607977140. The cubic root of 144169509 is about 524.3538645156.

It can be divided in two parts, 144 and 169509, that added together give a triangular number (169653 = T₅₈₂).

The spelling of 144169509 in words is "one hundred forty-four million, one hundred sixty-nine thousand, five hundred nine".