144509893 has 4 divisors (see below), whose sum is σ = 157647168. Its totient is φ = 131372620.

The previous prime is 144509887. The next prime is 144509903. The reversal of 144509893 is 398905441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144509893 - 2⁵ = 144509861 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 (144509093) 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 3 ways as a sum of consecutive naturals, for example, 6568621 + ... + 6568642.

It is an arithmetic number, because the mean of its divisors is an integer number (39411792).

Almost surely, 2^144509893 is an apocalyptic number.

It is an amenable number.

144509893 is a deficient number, since it is larger than the sum of its proper divisors (13137275).

144509893 is a wasteful number, since it uses less digits than its factorization.

144509893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13137274.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 144509893 is about 12021.2267676806. The cubic root of 144509893 is about 524.7662064087.

The spelling of 144509893 in words is "one hundred forty-four million, five hundred nine thousand, eight hundred ninety-three".