206538463 has 4 divisors (see below), whose sum is σ = 206581360. Its totient is φ = 206495568.

The previous prime is 206538433. The next prime is 206538487. The reversal of 206538463 is 364835602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206538463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206538433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13158 + ... + 24211.

It is an arithmetic number, because the mean of its divisors is an integer number (51645340).

Almost surely, 2^206538463 is an apocalyptic number.

206538463 is a deficient number, since it is larger than the sum of its proper divisors (42897).

206538463 is an equidigital number, since it uses as much as digits as its factorization.

206538463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42896.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 206538463 is about 14371.4460998189. The cubic root of 206538463 is about 591.1081948763.

The spelling of 206538463 in words is "two hundred six million, five hundred thirty-eight thousand, four hundred sixty-three".