863144549 has 2 divisors, whose sum is σ = 863144550. Its totient is φ = 863144548.

The previous prime is 863144533. The next prime is 863144551. The reversal of 863144549 is 945441368.

863144549 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., 819676900 + 43467649 = 28630^2 + 6593^2 .

It is a cyclic number.

It is not a de Polignac number, because 863144549 - 2⁴ = 863144533 is a prime.

Together with 863144551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863141549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431572274 + 431572275.

It is an arithmetic number, because the mean of its divisors is an integer number (431572275).

Almost surely, 2^863144549 is an apocalyptic number.

It is an amenable number.

863144549 is a deficient number, since it is larger than the sum of its proper divisors (1).

863144549 is an equidigital number, since it uses as much as digits as its factorization.

863144549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 44.

The square root of 863144549 is about 29379.3217927167. The cubic root of 863144549 is about 952.1261885344.

The spelling of 863144549 in words is "eight hundred sixty-three million, one hundred forty-four thousand, five hundred forty-nine".