144444749 has 4 divisors (see below), whose sum is σ = 144547260. Its totient is φ = 144342240.

The previous prime is 144444731. The next prime is 144444787. The reversal of 144444749 is 947444441.

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 75255625 + 69189124 = 8675^2 + 8318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144444749 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 (144444709) 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, 49112 + ... + 51969.

It is an arithmetic number, because the mean of its divisors is an integer number (36136815).

Almost surely, 2^144444749 is an apocalyptic number.

It is an amenable number.

144444749 is a deficient number, since it is larger than the sum of its proper divisors (102511).

144444749 is a wasteful number, since it uses less digits than its factorization.

144444749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102510.

The product of its digits is 258048, while the sum is 41.

The square root of 144444749 is about 12018.5169218169. The cubic root of 144444749 is about 524.6873409710.

The spelling of 144444749 in words is "one hundred forty-four million, four hundred forty-four thousand, seven hundred forty-nine".