243206343269 has 2 divisors, whose sum is σ = 243206343270. Its totient is φ = 243206343268.

The previous prime is 243206343257. The next prime is 243206343307. The reversal of 243206343269 is 962343602342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226920755044 + 16285588225 = 476362^2 + 127615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243206343269 is a prime.

It is a super-2 number, since 2×243206343269² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243206343869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121603171634 + 121603171635.

It is an arithmetic number, because the mean of its divisors is an integer number (121603171635).

Almost surely, 2^243206343269 is an apocalyptic number.

It is an amenable number.

243206343269 is a deficient number, since it is larger than the sum of its proper divisors (1).

243206343269 is an equidigital number, since it uses as much as digits as its factorization.

243206343269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 44.

The spelling of 243206343269 in words is "two hundred forty-three billion, two hundred six million, three hundred forty-three thousand, two hundred sixty-nine".