144865639 has 2 divisors, whose sum is σ = 144865640. Its totient is φ = 144865638.

The previous prime is 144865621. The next prime is 144865649. The reversal of 144865639 is 936568441.

144865639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 144865639 - 2²³ = 136477031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144865649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72432819 + 72432820.

It is an arithmetic number, because the mean of its divisors is an integer number (72432820).

Almost surely, 2^144865639 is an apocalyptic number.

144865639 is a deficient number, since it is larger than the sum of its proper divisors (1).

144865639 is an equidigital number, since it uses as much as digits as its factorization.

144865639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The square root of 144865639 is about 12036.0142489115. The cubic root of 144865639 is about 525.1964664537.

The spelling of 144865639 in words is "one hundred forty-four million, eight hundred sixty-five thousand, six hundred thirty-nine".