243243090667 has 2 divisors, whose sum is σ = 243243090668. Its totient is φ = 243243090666.

The previous prime is 243243090659. The next prime is 243243090737. The reversal of 243243090667 is 766090342342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243243090667 - 2³ = 243243090659 is a prime.

It is not a weakly prime, because it can be changed into another prime (243243091667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121621545333 + 121621545334.

It is an arithmetic number, because the mean of its divisors is an integer number (121621545334).

Almost surely, 2^243243090667 is an apocalyptic number.

243243090667 is a deficient number, since it is larger than the sum of its proper divisors (1).

243243090667 is an equidigital number, since it uses as much as digits as its factorization.

243243090667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 46.

The spelling of 243243090667 in words is "two hundred forty-three billion, two hundred forty-three million, ninety thousand, six hundred sixty-seven".