144839857 has 2 divisors, whose sum is σ = 144839858. Its totient is φ = 144839856.

The previous prime is 144839797. The next prime is 144839861. The reversal of 144839857 is 758938441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90611361 + 54228496 = 9519^2 + 7364^2 .

It is a cyclic number.

It is not a de Polignac number, because 144839857 - 2¹¹ = 144837809 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144839857.

It is not a weakly prime, because it can be changed into another prime (144834857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72419928 + 72419929.

It is an arithmetic number, because the mean of its divisors is an integer number (72419929).

Almost surely, 2^144839857 is an apocalyptic number.

It is an amenable number.

144839857 is a deficient number, since it is larger than the sum of its proper divisors (1).

144839857 is an equidigital number, since it uses as much as digits as its factorization.

144839857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The square root of 144839857 is about 12034.9431656323. The cubic root of 144839857 is about 525.1653078832.

The spelling of 144839857 in words is "one hundred forty-four million, eight hundred thirty-nine thousand, eight hundred fifty-seven".