144473661 has 6 divisors (see below), whose sum is σ = 208684190. Its totient is φ = 96315768.

The previous prime is 144473653. The next prime is 144473669. The reversal of 144473661 is 166374441.

It is an interprime number because it is at equal distance from previous prime (144473653) and next prime (144473669).

It can be written as a sum of positive squares in only one way, i.e., 142205625 + 2268036 = 11925^2 + 1506^2 .

It is not a de Polignac number, because 144473661 - 2³ = 144473653 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 (144473669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8026306 + ... + 8026323.

Almost surely, 2^144473661 is an apocalyptic number.

It is an amenable number.

144473661 is a deficient number, since it is larger than the sum of its proper divisors (64210529).

144473661 is a wasteful number, since it uses less digits than its factorization.

144473661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16052635 (or 16052632 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 144473661 is about 12019.7196722719. The cubic root of 144473661 is about 524.7223457012.

The spelling of 144473661 in words is "one hundred forty-four million, four hundred seventy-three thousand, six hundred sixty-one".