206443893 has 4 divisors (see below), whose sum is σ = 275258528. Its totient is φ = 137629260.

The previous prime is 206443889. The next prime is 206443907. The reversal of 206443893 is 398344602.

206443893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 206443893 - 2² = 206443889 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 (206443813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34407313 + ... + 34407318.

It is an arithmetic number, because the mean of its divisors is an integer number (68814632).

Almost surely, 2^206443893 is an apocalyptic number.

It is an amenable number.

206443893 is a deficient number, since it is larger than the sum of its proper divisors (68814635).

206443893 is an equidigital number, since it uses as much as digits as its factorization.

206443893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68814634.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 206443893 is about 14368.1555183677. The cubic root of 206443893 is about 591.0179620687.

The spelling of 206443893 in words is "two hundred six million, four hundred forty-three thousand, eight hundred ninety-three".