242440109 has 2 divisors, whose sum is σ = 242440110. Its totient is φ = 242440108.

The previous prime is 242440091. The next prime is 242440117. The reversal of 242440109 is 901044242.

Together with previous prime (242440091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163763209 + 78676900 = 12797^2 + 8870^2 .

It is a cyclic number.

It is not a de Polignac number, because 242440109 - 2²⁰ = 241391533 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 (242440139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121220054 + 121220055.

It is an arithmetic number, because the mean of its divisors is an integer number (121220055).

Almost surely, 2^242440109 is an apocalyptic number.

It is an amenable number.

242440109 is a deficient number, since it is larger than the sum of its proper divisors (1).

242440109 is an equidigital number, since it uses as much as digits as its factorization.

242440109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 242440109 is about 15570.4883995333. The cubic root of 242440109 is about 623.5455107768.

The spelling of 242440109 in words is "two hundred forty-two million, four hundred forty thousand, one hundred nine".