242895869 has 2 divisors, whose sum is σ = 242895870. Its totient is φ = 242895868.

The previous prime is 242895853. The next prime is 242895871. The reversal of 242895869 is 968598242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242206969 + 688900 = 15563^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 242895869 - 2⁴ = 242895853 is a prime.

It is a super-2 number, since 2×242895869² = 117996806354530322, which contains 22 as substring.

Together with 242895871, it forms a pair of twin primes.

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 242895869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242895769) 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, 121447934 + 121447935.

It is an arithmetic number, because the mean of its divisors is an integer number (121447935).

Almost surely, 2^242895869 is an apocalyptic number.

It is an amenable number.

242895869 is a deficient number, since it is larger than the sum of its proper divisors (1).

242895869 is an equidigital number, since it uses as much as digits as its factorization.

242895869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 53.

The square root of 242895869 is about 15585.1169068442. The cubic root of 242895869 is about 623.9359978804.

The spelling of 242895869 in words is "two hundred forty-two million, eight hundred ninety-five thousand, eight hundred sixty-nine".