144421903 has 2 divisors, whose sum is σ = 144421904. Its totient is φ = 144421902.

The previous prime is 144421897. The next prime is 144421913. The reversal of 144421903 is 309124441.

144421903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (309124441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144421903 - 2¹⁷ = 144290831 is a prime.

It is a super-2 number, since 2×144421903² = 41715372132282818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144421913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72210951 + 72210952.

It is an arithmetic number, because the mean of its divisors is an integer number (72210952).

Almost surely, 2^144421903 is an apocalyptic number.

144421903 is a deficient number, since it is larger than the sum of its proper divisors (1).

144421903 is an equidigital number, since it uses as much as digits as its factorization.

144421903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 144421903 is about 12017.5664341829. The cubic root of 144421903 is about 524.6596772470.

The spelling of 144421903 in words is "one hundred forty-four million, four hundred twenty-one thousand, nine hundred three".