206430089 has 2 divisors, whose sum is σ = 206430090. Its totient is φ = 206430088.

The previous prime is 206430061. The next prime is 206430097. The reversal of 206430089 is 980034602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123765625 + 82664464 = 11125^2 + 9092^2 .

It is a cyclic number.

It is not a de Polignac number, because 206430089 - 2²⁴ = 189652873 is a prime.

It is a super-2 number, since 2×206430089² = 85226763289095842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206430989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103215044 + 103215045.

It is an arithmetic number, because the mean of its divisors is an integer number (103215045).

Almost surely, 2^206430089 is an apocalyptic number.

It is an amenable number.

206430089 is a deficient number, since it is larger than the sum of its proper divisors (1).

206430089 is an equidigital number, since it uses as much as digits as its factorization.

206430089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 206430089 is about 14367.6751424856. The cubic root of 206430089 is about 591.0047888466.

The spelling of 206430089 in words is "two hundred six million, four hundred thirty thousand, eighty-nine".