144074981 has 2 divisors, whose sum is σ = 144074982. Its totient is φ = 144074980.

The previous prime is 144074977. The next prime is 144074993. The reversal of 144074981 is 189470441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139452481 + 4622500 = 11809^2 + 2150^2 .

It is an emirp because it is prime and its reverse (189470441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144074981 - 2² = 144074977 is a prime.

It is a super-2 number, since 2×144074981² = 41515200300300722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144074911) 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 as a sum of consecutive naturals, namely, 72037490 + 72037491.

It is an arithmetic number, because the mean of its divisors is an integer number (72037491).

Almost surely, 2^144074981 is an apocalyptic number.

It is an amenable number.

144074981 is a deficient number, since it is larger than the sum of its proper divisors (1).

144074981 is an equidigital number, since it uses as much as digits as its factorization.

144074981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 144074981 is about 12003.1238017443. The cubic root of 144074981 is about 524.2392379684.

The spelling of 144074981 in words is "one hundred forty-four million, seventy-four thousand, nine hundred eighty-one".