206403189 has 8 divisors (see below), whose sum is σ = 276251712. Its totient is φ = 137078400.

The previous prime is 206403187. The next prime is 206403191. The reversal of 206403189 is 981304602.

It is an interprime number because it is at equal distance from previous prime (206403187) and next prime (206403191).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206403189 - 2¹ = 206403187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206403187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130012 + ... + 131589.

It is an arithmetic number, because the mean of its divisors is an integer number (34531464).

Almost surely, 2^206403189 is an apocalyptic number.

It is an amenable number.

206403189 is a deficient number, since it is larger than the sum of its proper divisors (69848523).

206403189 is a wasteful number, since it uses less digits than its factorization.

206403189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261867.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 206403189 is about 14366.7389828033. The cubic root of 206403189 is about 590.9791163626.

The spelling of 206403189 in words is "two hundred six million, four hundred three thousand, one hundred eighty-nine".