242818661 has 2 divisors, whose sum is σ = 242818662. Its totient is φ = 242818660.

The previous prime is 242818657. The next prime is 242818669. The reversal of 242818661 is 166818242.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150062500 + 92756161 = 12250^2 + 9631^2 .

It is a cyclic number.

It is not a de Polignac number, because 242818661 - 2² = 242818657 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242818669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121409330 + 121409331.

It is an arithmetic number, because the mean of its divisors is an integer number (121409331).

Almost surely, 2^242818661 is an apocalyptic number.

It is an amenable number.

242818661 is a deficient number, since it is larger than the sum of its proper divisors (1).

242818661 is an equidigital number, since it uses as much as digits as its factorization.

242818661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 38.

The square root of 242818661 is about 15582.6397314447. The cubic root of 242818661 is about 623.8698818176.

The spelling of 242818661 in words is "two hundred forty-two million, eight hundred eighteen thousand, six hundred sixty-one".