206438263 has 2 divisors, whose sum is σ = 206438264. Its totient is φ = 206438262.

The previous prime is 206438237. The next prime is 206438279. The reversal of 206438263 is 362834602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206438263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206438663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103219131 + 103219132.

It is an arithmetic number, because the mean of its divisors is an integer number (103219132).

Almost surely, 2^206438263 is an apocalyptic number.

206438263 is a deficient number, since it is larger than the sum of its proper divisors (1).

206438263 is an equidigital number, since it uses as much as digits as its factorization.

206438263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 206438263 is about 14367.9595976603. The cubic root of 206438263 is about 591.0125894041.

The spelling of 206438263 in words is "two hundred six million, four hundred thirty-eight thousand, two hundred sixty-three".