206487 has 6 divisors (see below), whose sum is σ = 298272. Its totient is φ = 137652.

The previous prime is 206483. The next prime is 206489. The reversal of 206487 is 784602.

It is not a de Polignac number, because 206487 - 2² = 206483 is a prime.

206487 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 206487.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206487.

It is not an unprimeable number, because it can be changed into a prime (206483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11463 + ... + 11480.

It is an arithmetic number, because the mean of its divisors is an integer number (49712).

206487 is a Friedman number, since it can be written as 86*7^4+2^0, using all its digits and the basic arithmetic operations.

2²⁰⁶⁴⁸⁷ is an apocalyptic number.

206487 is a deficient number, since it is larger than the sum of its proper divisors (91785).

206487 is a wasteful number, since it uses less digits than its factorization.

206487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22949 (or 22946 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 206487 is about 454.4084066124. The cubic root of 206487 is about 59.1059095502.

The spelling of 206487 in words is "two hundred six thousand, four hundred eighty-seven".