144436639 has 2 divisors, whose sum is σ = 144436640. Its totient is φ = 144436638.

The previous prime is 144436637. The next prime is 144436679. The reversal of 144436639 is 936634441.

It is an a-pointer prime, because the next prime (144436679) can be obtained adding 144436639 to its sum of digits (40).

It is a weak prime.

It is an emirp because it is prime and its reverse (936634441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144436639 - 2¹ = 144436637 is a prime.

Together with 144436637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144436631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72218319 + 72218320.

It is an arithmetic number, because the mean of its divisors is an integer number (72218320).

Almost surely, 2^144436639 is an apocalyptic number.

144436639 is a deficient number, since it is larger than the sum of its proper divisors (1).

144436639 is an equidigital number, since it uses as much as digits as its factorization.

144436639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 40.

The square root of 144436639 is about 12018.1795210423. The cubic root of 144436639 is about 524.6775210825.

It can be divided in two parts, 1444 and 36639, that added together give a palindrome (38083).

The spelling of 144436639 in words is "one hundred forty-four million, four hundred thirty-six thousand, six hundred thirty-nine".