144448981 has 4 divisors (see below), whose sum is σ = 144563200. Its totient is φ = 144334764.

The previous prime is 144448979. The next prime is 144448987. The reversal of 144448981 is 189844441.

144448981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144448981 - 2¹ = 144448979 is a prime.

It is a super-2 number, since 2×144448981² = 41731016223876722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144448987) 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, 55191 + ... + 57748.

It is an arithmetic number, because the mean of its divisors is an integer number (36140800).

Almost surely, 2^144448981 is an apocalyptic number.

It is an amenable number.

144448981 is a deficient number, since it is larger than the sum of its proper divisors (114219).

144448981 is a wasteful number, since it uses less digits than its factorization.

144448981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114218.

The product of its digits is 147456, while the sum is 43.

The square root of 144448981 is about 12018.6929821840. The cubic root of 144448981 is about 524.6924650874.

The spelling of 144448981 in words is "one hundred forty-four million, four hundred forty-eight thousand, nine hundred eighty-one".