243212663 has 2 divisors, whose sum is σ = 243212664. Its totient is φ = 243212662.

The previous prime is 243212657. The next prime is 243212677. The reversal of 243212663 is 366212342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243212663 - 2¹⁶ = 243147127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243212653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121606331 + 121606332.

It is an arithmetic number, because the mean of its divisors is an integer number (121606332).

Almost surely, 2^243212663 is an apocalyptic number.

243212663 is a deficient number, since it is larger than the sum of its proper divisors (1).

243212663 is an equidigital number, since it uses as much as digits as its factorization.

243212663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

The square root of 243212663 is about 15595.2769452806. The cubic root of 243212663 is about 624.2071336995.

The spelling of 243212663 in words is "two hundred forty-three million, two hundred twelve thousand, six hundred sixty-three".