144405497 has 6 divisors (see below), whose sum is σ = 153399918. Its totient is φ = 135910784.

The previous prime is 144405433. The next prime is 144405517. The reversal of 144405497 is 794504441.

It can be written as a sum of positive squares in 3 ways, for example, as 40691641 + 103713856 = 6379^2 + 10184^2 .

It is not a de Polignac number, because 144405497 - 2⁶ = 144405433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144405497.

It is not an unprimeable number, because it can be changed into a prime (144405427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 249548 + ... + 250125.

It is an arithmetic number, because the mean of its divisors is an integer number (25566653).

Almost surely, 2^144405497 is an apocalyptic number.

144405497 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

144405497 is a deficient number, since it is larger than the sum of its proper divisors (8994421).

144405497 is an equidigital number, since it uses as much as digits as its factorization.

144405497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499707 (or 499690 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 144405497 is about 12016.8838306776. The cubic root of 144405497 is about 524.6398097789.

The spelling of 144405497 in words is "one hundred forty-four million, four hundred five thousand, four hundred ninety-seven".