242689087 has 2 divisors, whose sum is σ = 242689088. Its totient is φ = 242689086.

The previous prime is 242689079. The next prime is 242689091. The reversal of 242689087 is 780986242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242689087 - 2³ = 242689079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242689037) 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, 121344543 + 121344544.

It is an arithmetic number, because the mean of its divisors is an integer number (121344544).

Almost surely, 2^242689087 is an apocalyptic number.

242689087 is a deficient number, since it is larger than the sum of its proper divisors (1).

242689087 is an equidigital number, since it uses as much as digits as its factorization.

242689087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 242689087 is about 15578.4815370433. The cubic root of 242689087 is about 623.7588913101.

The spelling of 242689087 in words is "two hundred forty-two million, six hundred eighty-nine thousand, eighty-seven".