243120717263 has 2 divisors, whose sum is σ = 243120717264. Its totient is φ = 243120717262.

The previous prime is 243120717251. The next prime is 243120717283. The reversal of 243120717263 is 362717021342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243120717263 - 2¹⁶ = 243120651727 is a prime.

It is a super-2 number, since 2×243120717263² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243120717233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560358631 + 121560358632.

It is an arithmetic number, because the mean of its divisors is an integer number (121560358632).

Almost surely, 2^243120717263 is an apocalyptic number.

243120717263 is a deficient number, since it is larger than the sum of its proper divisors (1).

243120717263 is an equidigital number, since it uses as much as digits as its factorization.

243120717263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 243120717263 in words is "two hundred forty-three billion, one hundred twenty million, seven hundred seventeen thousand, two hundred sixty-three".