144391809 has 8 divisors (see below), whose sum is σ = 192601152. Its totient is φ = 96221840.

The previous prime is 144391771. The next prime is 144391823. The reversal of 144391809 is 908193441.

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 144391809 - 2¹¹ = 144389761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144391859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172 + ... + 16994.

It is an arithmetic number, because the mean of its divisors is an integer number (24075144).

Almost surely, 2^144391809 is an apocalyptic number.

It is an amenable number.

144391809 is a deficient number, since it is larger than the sum of its proper divisors (48209343).

144391809 is a wasteful number, since it uses less digits than its factorization.

144391809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19687.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 144391809 is about 12016.3142851708. The cubic root of 144391809 is about 524.6232326246.

The spelling of 144391809 in words is "one hundred forty-four million, three hundred ninety-one thousand, eight hundred nine".