144421909 has 8 divisors (see below), whose sum is σ = 146416032. Its totient is φ = 142434000.

The previous prime is 144421903. The next prime is 144421913. The reversal of 144421909 is 909124441.

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 144421909 - 2⁵ = 144421877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144421903) 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, 63034 + ... + 65284.

It is an arithmetic number, because the mean of its divisors is an integer number (18302004).

Almost surely, 2^144421909 is an apocalyptic number.

It is an amenable number.

144421909 is a deficient number, since it is larger than the sum of its proper divisors (1994123).

144421909 is an equidigital number, since it uses as much as digits as its factorization.

144421909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 144421909 is about 12017.5666838175. The cubic root of 144421909 is about 524.6596845126.

The spelling of 144421909 in words is "one hundred forty-four million, four hundred twenty-one thousand, nine hundred nine".