144381661 has 2 divisors, whose sum is σ = 144381662. Its totient is φ = 144381660.

The previous prime is 144381647. The next prime is 144381667. The reversal of 144381661 is 166183441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143856036 + 525625 = 11994^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 144381661 - 2⁷ = 144381533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144381667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72190830 + 72190831.

It is an arithmetic number, because the mean of its divisors is an integer number (72190831).

Almost surely, 2^144381661 is an apocalyptic number.

It is an amenable number.

144381661 is a deficient number, since it is larger than the sum of its proper divisors (1).

144381661 is an equidigital number, since it uses as much as digits as its factorization.

144381661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 144381661 is about 12015.8920184895. The cubic root of 144381661 is about 524.6109419891.

The spelling of 144381661 in words is "one hundred forty-four million, three hundred eighty-one thousand, six hundred sixty-one".