242685865769 has 2 divisors, whose sum is σ = 242685865770. Its totient is φ = 242685865768.

The previous prime is 242685865711. The next prime is 242685865789. The reversal of 242685865769 is 967568586242.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145832334400 + 96853531369 = 381880^2 + 311213^2 .

It is a cyclic number.

It is not a de Polignac number, because 242685865769 - 2²⁴ = 242669088553 is a prime.

It is a super-2 number, since 2×242685865769² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 242685865699 and 242685865708.

It is not a weakly prime, because it can be changed into another prime (242685865789) 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, 121342932884 + 121342932885.

It is an arithmetic number, because the mean of its divisors is an integer number (121342932885).

Almost surely, 2^242685865769 is an apocalyptic number.

It is an amenable number.

242685865769 is a deficient number, since it is larger than the sum of its proper divisors (1).

242685865769 is an equidigital number, since it uses as much as digits as its factorization.

242685865769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 348364800, while the sum is 68.

The spelling of 242685865769 in words is "two hundred forty-two billion, six hundred eighty-five million, eight hundred sixty-five thousand, seven hundred sixty-nine".