242766779 has 4 divisors (see below), whose sum is σ = 243203184. Its totient is φ = 242330376.

The previous prime is 242766773. The next prime is 242766791. The reversal of 242766779 is 977667242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242766779 - 2²⁰ = 241718203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242766773) 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 in 3 ways as a sum of consecutive naturals, for example, 217367 + ... + 218480.

It is an arithmetic number, because the mean of its divisors is an integer number (60800796).

Almost surely, 2^242766779 is an apocalyptic number.

242766779 is a deficient number, since it is larger than the sum of its proper divisors (436405).

242766779 is an equidigital number, since it uses as much as digits as its factorization.

242766779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436404.

The product of its digits is 1778112, while the sum is 50.

The square root of 242766779 is about 15580.9749053132. The cubic root of 242766779 is about 623.8254454707.

It can be divided in two parts, 2 and 42766779, that multiplied together give a palindrome (85533558).

The spelling of 242766779 in words is "two hundred forty-two million, seven hundred sixty-six thousand, seven hundred seventy-nine".