206417091 has 16 divisors (see below), whose sum is σ = 281548800. Its totient is φ = 134458368.

The previous prime is 206417089. The next prime is 206417131. The reversal of 206417091 is 190714602.

It is a happy number.

206417091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 206417091 - 2¹ = 206417089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206417011) 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, 145795 + ... + 147203.

It is an arithmetic number, because the mean of its divisors is an integer number (17596800).

Almost surely, 2^206417091 is an apocalyptic number.

206417091 is a deficient number, since it is larger than the sum of its proper divisors (75131709).

206417091 is a wasteful number, since it uses less digits than its factorization.

206417091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 206417091 is about 14367.2228005276. Note that the first 3 decimals coincide. The cubic root of 206417091 is about 590.9923842572.

The spelling of 206417091 in words is "two hundred six million, four hundred seventeen thousand, ninety-one".