144445669 has 4 divisors (see below), whose sum is σ = 148349644. Its totient is φ = 140541696.

The previous prime is 144445667. The next prime is 144445673. The reversal of 144445669 is 966544441.

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 93508900 + 50936769 = 9670^2 + 7137^2 .

It is a cyclic number.

It is not a de Polignac number, because 144445669 - 2¹ = 144445667 is a prime.

It is a super-2 number, since 2×144445669² = 41729102585715122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144445667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1951932 + ... + 1952005.

It is an arithmetic number, because the mean of its divisors is an integer number (37087411).

Almost surely, 2^144445669 is an apocalyptic number.

It is an amenable number.

144445669 is a deficient number, since it is larger than the sum of its proper divisors (3903975).

144445669 is an equidigital number, since it uses as much as digits as its factorization.

144445669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903974.

The product of its digits is 414720, while the sum is 43.

The square root of 144445669 is about 12018.5551960292. Note that the first 3 decimals coincide. The cubic root of 144445669 is about 524.6884549179.

The spelling of 144445669 in words is "one hundred forty-four million, four hundred forty-five thousand, six hundred sixty-nine".