242490239 has 2 divisors, whose sum is σ = 242490240. Its totient is φ = 242490238.

The previous prime is 242490233. The next prime is 242490247. The reversal of 242490239 is 932094242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242490239 - 2⁴ = 242490223 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 242490199 and 242490208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242490233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121245119 + 121245120.

It is an arithmetic number, because the mean of its divisors is an integer number (121245120).

Almost surely, 2^242490239 is an apocalyptic number.

242490239 is a deficient number, since it is larger than the sum of its proper divisors (1).

242490239 is an equidigital number, since it uses as much as digits as its factorization.

242490239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 242490239 is about 15572.0980924216. The cubic root of 242490239 is about 623.5884852148.

The spelling of 242490239 in words is "two hundred forty-two million, four hundred ninety thousand, two hundred thirty-nine".