242863549 has 2 divisors, whose sum is σ = 242863550. Its totient is φ = 242863548.

The previous prime is 242863531. The next prime is 242863573. The reversal of 242863549 is 945368242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227708100 + 15155449 = 15090^2 + 3893^2 .

It is a cyclic number.

It is not a de Polignac number, because 242863549 - 2⁷ = 242863421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242863519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121431774 + 121431775.

It is an arithmetic number, because the mean of its divisors is an integer number (121431775).

Almost surely, 2^242863549 is an apocalyptic number.

It is an amenable number.

242863549 is a deficient number, since it is larger than the sum of its proper divisors (1).

242863549 is an equidigital number, since it uses as much as digits as its factorization.

242863549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 43.

The square root of 242863549 is about 15584.0799856777. The cubic root of 242863549 is about 623.9083227755.

The spelling of 242863549 in words is "two hundred forty-two million, eight hundred sixty-three thousand, five hundred forty-nine".