242994217 has 2 divisors, whose sum is σ = 242994218. Its totient is φ = 242994216.

The previous prime is 242994197. The next prime is 242994221. The reversal of 242994217 is 712499242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185477161 + 57517056 = 13619^2 + 7584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242994217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242994217.

It is not a weakly prime, because it can be changed into another prime (242994317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121497108 + 121497109.

It is an arithmetic number, because the mean of its divisors is an integer number (121497109).

Almost surely, 2^242994217 is an apocalyptic number.

It is an amenable number.

242994217 is a deficient number, since it is larger than the sum of its proper divisors (1).

242994217 is an equidigital number, since it uses as much as digits as its factorization.

242994217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 242994217 is about 15588.2717772048. The cubic root of 242994217 is about 624.0201966192.

The spelling of 242994217 in words is "two hundred forty-two million, nine hundred ninety-four thousand, two hundred seventeen".