144639437 has 2 divisors, whose sum is σ = 144639438. Its totient is φ = 144639436.

The previous prime is 144639421. The next prime is 144639449. The reversal of 144639437 is 734936441.

144639437 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 can be written as a sum of positive squares in only one way, i.e., 141752836 + 2886601 = 11906^2 + 1699^2 .

It is an emirp because it is prime and its reverse (734936441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144639437 - 2⁴ = 144639421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144639394 and 144639403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144639337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72319718 + 72319719.

It is an arithmetic number, because the mean of its divisors is an integer number (72319719).

Almost surely, 2^144639437 is an apocalyptic number.

It is an amenable number.

144639437 is a deficient number, since it is larger than the sum of its proper divisors (1).

144639437 is an equidigital number, since it uses as much as digits as its factorization.

144639437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 41.

The square root of 144639437 is about 12026.6136962987. The cubic root of 144639437 is about 524.9229661727.

The spelling of 144639437 in words is "one hundred forty-four million, six hundred thirty-nine thousand, four hundred thirty-seven".