144664673 has 4 divisors (see below), whose sum is σ = 149653140. Its totient is φ = 139676208.

The previous prime is 144664661. The next prime is 144664697. The reversal of 144664673 is 376466441.

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 32982049 + 111682624 = 5743^2 + 10568^2 .

It is a cyclic number.

It is not a de Polignac number, because 144664673 - 2⁶ = 144664609 is a prime.

It is a super-2 number, since 2×144664673² = 41855735228393858, which contains 22 as substring.

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 144664673.

It is not an unprimeable number, because it can be changed into a prime (144664643) 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, 2494190 + ... + 2494247.

It is an arithmetic number, because the mean of its divisors is an integer number (37413285).

Almost surely, 2^144664673 is an apocalyptic number.

It is an amenable number.

144664673 is a deficient number, since it is larger than the sum of its proper divisors (4988467).

144664673 is an equidigital number, since it uses as much as digits as its factorization.

144664673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988466.

The product of its digits is 290304, while the sum is 41.

The square root of 144664673 is about 12027.6628236744. The cubic root of 144664673 is about 524.9534930837.

The spelling of 144664673 in words is "one hundred forty-four million, six hundred sixty-four thousand, six hundred seventy-three".