144645909 has 16 divisors (see below), whose sum is σ = 198192960. Its totient is φ = 93779840.

The previous prime is 144645901. The next prime is 144645929. The reversal of 144645909 is 909546441.

It is a cyclic number.

It is not a de Polignac number, because 144645909 - 2³ = 144645901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144645901) 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, 40987 + ... + 44375.

It is an arithmetic number, because the mean of its divisors is an integer number (12387060).

Almost surely, 2^144645909 is an apocalyptic number.

It is an amenable number.

144645909 is a deficient number, since it is larger than the sum of its proper divisors (53547051).

144645909 is a wasteful number, since it uses less digits than its factorization.

144645909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 144645909 is about 12026.8827632101. The cubic root of 144645909 is about 524.9307954131.

The spelling of 144645909 in words is "one hundred forty-four million, six hundred forty-five thousand, nine hundred nine".