242873539 has 2 divisors, whose sum is σ = 242873540. Its totient is φ = 242873538.

The previous prime is 242873497. The next prime is 242873549. The reversal of 242873539 is 935378242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242873539 - 2²¹ = 240776387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242873495 and 242873504.

It is not a weakly prime, because it can be changed into another prime (242873549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121436769 + 121436770.

It is an arithmetic number, because the mean of its divisors is an integer number (121436770).

Almost surely, 2^242873539 is an apocalyptic number.

242873539 is a deficient number, since it is larger than the sum of its proper divisors (1).

242873539 is an equidigital number, since it uses as much as digits as its factorization.

242873539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 242873539 is about 15584.4005017838. The cubic root of 242873539 is about 623.9168773167.

The spelling of 242873539 in words is "two hundred forty-two million, eight hundred seventy-three thousand, five hundred thirty-nine".