144299381 has 2 divisors, whose sum is σ = 144299382. Its totient is φ = 144299380.

The previous prime is 144299369. The next prime is 144299387. The reversal of 144299381 is 183992441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86676100 + 57623281 = 9310^2 + 7591^2 .

It is an emirp because it is prime and its reverse (183992441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144299381 - 2⁶ = 144299317 is a prime.

It is a super-2 number, since 2×144299381² = 41644622713966322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144299387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72149690 + 72149691.

It is an arithmetic number, because the mean of its divisors is an integer number (72149691).

Almost surely, 2^144299381 is an apocalyptic number.

It is an amenable number.

144299381 is a deficient number, since it is larger than the sum of its proper divisors (1).

144299381 is an equidigital number, since it uses as much as digits as its factorization.

144299381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 144299381 is about 12012.4677314863. The cubic root of 144299381 is about 524.5112682258.

The spelling of 144299381 in words is "one hundred forty-four million, two hundred ninety-nine thousand, three hundred eighty-one".