240442289 has 2 divisors, whose sum is σ = 240442290. Its totient is φ = 240442288.

The previous prime is 240442229. The next prime is 240442303. The reversal of 240442289 is 982244042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213744400 + 26697889 = 14620^2 + 5167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240442289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240442229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120221144 + 120221145.

It is an arithmetic number, because the mean of its divisors is an integer number (120221145).

Almost surely, 2^240442289 is an apocalyptic number.

It is an amenable number.

240442289 is a deficient number, since it is larger than the sum of its proper divisors (1).

240442289 is an equidigital number, since it uses as much as digits as its factorization.

240442289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 240442289 is about 15506.2016303155. The cubic root of 240442289 is about 621.8280154700.

The spelling of 240442289 in words is "two hundred forty million, four hundred forty-two thousand, two hundred eighty-nine".