144039169 has 4 divisors (see below), whose sum is σ = 144559444. Its totient is φ = 143518896.

The previous prime is 144039163. The next prime is 144039173. The reversal of 144039169 is 961930441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82573569 + 61465600 = 9087^2 + 7840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144039169 is a prime.

It is a super-2 number, since 2×144039169² = 41494564412421122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144039163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259722 + ... + 260275.

It is an arithmetic number, because the mean of its divisors is an integer number (36139861).

Almost surely, 2^144039169 is an apocalyptic number.

It is an amenable number.

144039169 is a deficient number, since it is larger than the sum of its proper divisors (520275).

144039169 is an equidigital number, since it uses as much as digits as its factorization.

144039169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520274.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 144039169 is about 12001.6319307001. The cubic root of 144039169 is about 524.1957985241.

The spelling of 144039169 in words is "one hundred forty-four million, thirty-nine thousand, one hundred sixty-nine".