144744905 has 4 divisors (see below), whose sum is σ = 173693892. Its totient is φ = 115795920.

The previous prime is 144744893. The next prime is 144744917. The reversal of 144744905 is 509447441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509447441 = 22147 ⋅23003.

It is an interprime number because it is at equal distance from previous prime (144744893) and next prime (144744917).

It can be written as a sum of positive squares in 2 ways, for example, as 41783296 + 102961609 = 6464^2 + 10147^2 .

It is not a de Polignac number, because 144744905 - 2¹² = 144740809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14474486 + ... + 14474495.

It is an arithmetic number, because the mean of its divisors is an integer number (43423473).

Almost surely, 2^144744905 is an apocalyptic number.

It is an amenable number.

144744905 is a deficient number, since it is larger than the sum of its proper divisors (28948987).

144744905 is an equidigital number, since it uses as much as digits as its factorization.

144744905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28948986.

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

The square root of 144744905 is about 12030.9976726787. The cubic root of 144744905 is about 525.0505227267.

The spelling of 144744905 in words is "one hundred forty-four million, seven hundred forty-four thousand, nine hundred five".