206386489 has 2 divisors, whose sum is σ = 206386490. Its totient is φ = 206386488.

The previous prime is 206386469. The next prime is 206386547. The reversal of 206386489 is 984683602.

It is a happy number.

206386489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166797225 + 39589264 = 12915^2 + 6292^2 .

It is a cyclic number.

It is not a de Polignac number, because 206386489 - 2¹⁷ = 206255417 is a prime.

It is a super-3 number, since 3×206386489³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206386469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103193244 + 103193245.

It is an arithmetic number, because the mean of its divisors is an integer number (103193245).

Almost surely, 2^206386489 is an apocalyptic number.

It is an amenable number.

206386489 is a deficient number, since it is larger than the sum of its proper divisors (1).

206386489 is an equidigital number, since it uses as much as digits as its factorization.

206386489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 206386489 is about 14366.1577674756. The cubic root of 206386489 is about 590.9631773043.

The spelling of 206386489 in words is "two hundred six million, three hundred eighty-six thousand, four hundred eighty-nine".