206443897 has 16 divisors (see below), whose sum is σ = 232170624. Its totient is φ = 181936000.

The previous prime is 206443889. The next prime is 206443907. The reversal of 206443897 is 798344602.

206443897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 206443897 - 2³ = 206443889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206443847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73947 + ... + 76687.

It is an arithmetic number, because the mean of its divisors is an integer number (14510664).

Almost surely, 2^206443897 is an apocalyptic number.

It is an amenable number.

206443897 is a deficient number, since it is larger than the sum of its proper divisors (25726727).

206443897 is a wasteful number, since it uses less digits than its factorization.

206443897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2960.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 206443897 is about 14368.1556575644. The cubic root of 206443897 is about 591.0179658858.

The spelling of 206443897 in words is "two hundred six million, four hundred forty-three thousand, eight hundred ninety-seven".