243042996017 has 2 divisors, whose sum is σ = 243042996018. Its totient is φ = 243042996016.

The previous prime is 243042995999. The next prime is 243042996023. The reversal of 243042996017 is 710699240342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190585506721 + 52457489296 = 436561^2 + 229036^2 .

It is a cyclic number.

It is not a de Polignac number, because 243042996017 - 2²⁴ = 243026218801 is a prime.

It is a super-3 number, since 3×243042996017³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (243042996037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121521498008 + 121521498009.

It is an arithmetic number, because the mean of its divisors is an integer number (121521498009).

Almost surely, 2^243042996017 is an apocalyptic number.

It is an amenable number.

243042996017 is a deficient number, since it is larger than the sum of its proper divisors (1).

243042996017 is an equidigital number, since it uses as much as digits as its factorization.

243042996017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 243042996017 in words is "two hundred forty-three billion, forty-two million, nine hundred ninety-six thousand, seventeen".