243404102017 has 2 divisors, whose sum is σ = 243404102018. Its totient is φ = 243404102016.

The previous prime is 243404101987. The next prime is 243404102021. The reversal of 243404102017 is 710201404342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210978536976 + 32425565041 = 459324^2 + 180071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243404102017 is a prime.

It is not a weakly prime, because it can be changed into another prime (243404102027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121702051008 + 121702051009.

It is an arithmetic number, because the mean of its divisors is an integer number (121702051009).

Almost surely, 2^243404102017 is an apocalyptic number.

It is an amenable number.

243404102017 is a deficient number, since it is larger than the sum of its proper divisors (1).

243404102017 is an equidigital number, since it uses as much as digits as its factorization.

243404102017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 243404102017 its reverse (710201404342), we get a palindrome (953605506359).

The spelling of 243404102017 in words is "two hundred forty-three billion, four hundred four million, one hundred two thousand, seventeen".