144838981 has 16 divisors (see below), whose sum is σ = 173115648. Its totient is φ = 118483200.

The previous prime is 144838961. The next prime is 144838987. The reversal of 144838981 is 189838441.

It is a 4-Lehmer number, since φ(144838981) divides (144838981-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 144838981 - 2⁷ = 144838853 is a prime.

It is a super-2 number, since 2×144838981² = 41956660834236722, 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 (144838987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105741 + ... + 107101.

It is an arithmetic number, because the mean of its divisors is an integer number (10819728).

Almost surely, 2^144838981 is an apocalyptic number.

It is an amenable number.

144838981 is a deficient number, since it is larger than the sum of its proper divisors (28276667).

144838981 is a wasteful number, since it uses less digits than its factorization.

144838981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052.

The product of its digits is 221184, while the sum is 46.

The square root of 144838981 is about 12034.9067715542. The cubic root of 144838981 is about 525.1642491375.

The spelling of 144838981 in words is "one hundred forty-four million, eight hundred thirty-eight thousand, nine hundred eighty-one".