242740073 has 2 divisors, whose sum is σ = 242740074. Its totient is φ = 242740072.

The previous prime is 242740019. The next prime is 242740081. The reversal of 242740073 is 370047242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165071104 + 77668969 = 12848^2 + 8813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242740073 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (242740973) 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, 121370036 + 121370037.

It is an arithmetic number, because the mean of its divisors is an integer number (121370037).

Almost surely, 2^242740073 is an apocalyptic number.

It is an amenable number.

242740073 is a deficient number, since it is larger than the sum of its proper divisors (1).

242740073 is an equidigital number, since it uses as much as digits as its factorization.

242740073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 242740073 is about 15580.1178750355. The cubic root of 242740073 is about 623.8025696152.

The spelling of 242740073 in words is "two hundred forty-two million, seven hundred forty thousand, seventy-three".