206489651 has 2 divisors, whose sum is σ = 206489652. Its totient is φ = 206489650.

The previous prime is 206489639. The next prime is 206489669. The reversal of 206489651 is 156984602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206489651 - 2¹⁰ = 206488627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206489599 and 206489608.

It is not a weakly prime, because it can be changed into another prime (206489611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103244825 + 103244826.

It is an arithmetic number, because the mean of its divisors is an integer number (103244826).

Almost surely, 2^206489651 is an apocalyptic number.

206489651 is a deficient number, since it is larger than the sum of its proper divisors (1).

206489651 is an equidigital number, since it uses as much as digits as its factorization.

206489651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 206489651 is about 14369.7477709249. The cubic root of 206489651 is about 591.0616249443.

The spelling of 206489651 in words is "two hundred six million, four hundred eighty-nine thousand, six hundred fifty-one".