242979901 has 2 divisors, whose sum is σ = 242979902. Its totient is φ = 242979900.

The previous prime is 242979887. The next prime is 242979907. The reversal of 242979901 is 109979242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184824025 + 58155876 = 13595^2 + 7626^2 .

It is a cyclic number.

It is not a de Polignac number, because 242979901 - 2⁹ = 242979389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242979907) 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, 121489950 + 121489951.

It is an arithmetic number, because the mean of its divisors is an integer number (121489951).

Almost surely, 2^242979901 is an apocalyptic number.

It is an amenable number.

242979901 is a deficient number, since it is larger than the sum of its proper divisors (1).

242979901 is an equidigital number, since it uses as much as digits as its factorization.

242979901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 242979901 is about 15587.8125790632. The cubic root of 242979901 is about 624.0079416656.

The spelling of 242979901 in words is "two hundred forty-two million, nine hundred seventy-nine thousand, nine hundred one".