144545491 has 2 divisors, whose sum is σ = 144545492. Its totient is φ = 144545490.

The previous prime is 144545477. The next prime is 144545537. The reversal of 144545491 is 194545441.

It is a weak prime.

It is an emirp because it is prime and its reverse (194545441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144545491 - 2⁹ = 144544979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144545491.

It is not a weakly prime, because it can be changed into another prime (144545411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72272745 + 72272746.

It is an arithmetic number, because the mean of its divisors is an integer number (72272746).

Almost surely, 2^144545491 is an apocalyptic number.

144545491 is a deficient number, since it is larger than the sum of its proper divisors (1).

144545491 is an equidigital number, since it uses as much as digits as its factorization.

144545491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 37.

The square root of 144545491 is about 12022.7073074246. The cubic root of 144545491 is about 524.8092924870.

The spelling of 144545491 in words is "one hundred forty-four million, five hundred forty-five thousand, four hundred ninety-one".