206886091 has 4 divisors (see below), whose sum is σ = 207186184. Its totient is φ = 206586000.

The previous prime is 206886089. The next prime is 206886103. The reversal of 206886091 is 190688602.

206886091 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.

It is a cyclic number.

It is not a de Polignac number, because 206886091 - 2¹ = 206886089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206886061) 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, 149010 + ... + 150391.

It is an arithmetic number, because the mean of its divisors is an integer number (51796546).

Almost surely, 2^206886091 is an apocalyptic number.

206886091 is a deficient number, since it is larger than the sum of its proper divisors (300093).

206886091 is an equidigital number, since it uses as much as digits as its factorization.

206886091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300092.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 206886091 is about 14383.5354137987. The cubic root of 206886091 is about 591.4396433611.

The spelling of 206886091 in words is "two hundred six million, eight hundred eighty-six thousand, ninety-one".