242441989 has 2 divisors, whose sum is σ = 242441990. Its totient is φ = 242441988.

The previous prime is 242441987. The next prime is 242442029. The reversal of 242441989 is 989144242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242051364 + 390625 = 15558^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 242441989 - 2¹ = 242441987 is a prime.

It is a super-3 number, since 3×242441989³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 242441987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242441987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121220994 + 121220995.

It is an arithmetic number, because the mean of its divisors is an integer number (121220995).

Almost surely, 2^242441989 is an apocalyptic number.

It is an amenable number.

242441989 is a deficient number, since it is larger than the sum of its proper divisors (1).

242441989 is an equidigital number, since it uses as much as digits as its factorization.

242441989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 43.

The square root of 242441989 is about 15570.5487700338. The cubic root of 242441989 is about 623.5471225323.

The spelling of 242441989 in words is "two hundred forty-two million, four hundred forty-one thousand, nine hundred eighty-nine".