206543461 has 2 divisors, whose sum is σ = 206543462. Its totient is φ = 206543460.

The previous prime is 206543459. The next prime is 206543479. The reversal of 206543461 is 164345602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142062561 + 64480900 = 11919^2 + 8030^2 .

It is a cyclic number.

It is not a de Polignac number, because 206543461 - 2¹ = 206543459 is a prime.

Together with 206543459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206543401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103271730 + 103271731.

It is an arithmetic number, because the mean of its divisors is an integer number (103271731).

Almost surely, 2^206543461 is an apocalyptic number.

It is an amenable number.

206543461 is a deficient number, since it is larger than the sum of its proper divisors (1).

206543461 is an equidigital number, since it uses as much as digits as its factorization.

206543461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 206543461 is about 14371.6199852348. The cubic root of 206543461 is about 591.1129628904.

The spelling of 206543461 in words is "two hundred six million, five hundred forty-three thousand, four hundred sixty-one".