206390047 has 8 divisors (see below), whose sum is σ = 218664576. Its totient is φ = 194130432.

The previous prime is 206390029. The next prime is 206390059. The reversal of 206390047 is 740093602.

206390047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 206390047 - 2²³ = 198001439 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 (206390087) 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, 38578 + ... + 43600.

It is an arithmetic number, because the mean of its divisors is an integer number (27333072).

Almost surely, 2^206390047 is an apocalyptic number.

206390047 is a deficient number, since it is larger than the sum of its proper divisors (12274529).

206390047 is a wasteful number, since it uses less digits than its factorization.

206390047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7457.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 206390047 is about 14366.2815996346. The cubic root of 206390047 is about 590.9665732548.

The spelling of 206390047 in words is "two hundred six million, three hundred ninety thousand, forty-seven".