206032591 has 2 divisors, whose sum is σ = 206032592. Its totient is φ = 206032590.

The previous prime is 206032577. The next prime is 206032681. The reversal of 206032591 is 195230602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206032591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206092591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103016295 + 103016296.

It is an arithmetic number, because the mean of its divisors is an integer number (103016296).

Almost surely, 2^206032591 is an apocalyptic number.

206032591 is a deficient number, since it is larger than the sum of its proper divisors (1).

206032591 is an equidigital number, since it uses as much as digits as its factorization.

206032591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 206032591 is about 14353.8354107883. The cubic root of 206032591 is about 590.6252024336.

The spelling of 206032591 in words is "two hundred six million, thirty-two thousand, five hundred ninety-one".