206209047 has 12 divisors (see below), whose sum is σ = 302213240. Its totient is φ = 124974960.

The previous prime is 206209043. The next prime is 206209079. The reversal of 206209047 is 740902602.

It is a happy number.

It is not a de Polignac number, because 206209047 - 2² = 206209043 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 (206209043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 283672 + ... + 284397.

Almost surely, 2^206209047 is an apocalyptic number.

206209047 is a deficient number, since it is larger than the sum of its proper divisors (96004193).

206209047 is a wasteful number, since it uses less digits than its factorization.

206209047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568094 (or 568083 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 206209047 is about 14359.9807451124. The cubic root of 206209047 is about 590.7937673866.

The spelling of 206209047 in words is "two hundred six million, two hundred nine thousand, forty-seven".