206072491 has 2 divisors, whose sum is σ = 206072492. Its totient is φ = 206072490.

The previous prime is 206072473. The next prime is 206072501. The reversal of 206072491 is 194270602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206072491 - 2¹¹ = 206070443 is a prime.

It is not a weakly prime, because it can be changed into another prime (206072401) 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, 103036245 + 103036246.

It is an arithmetic number, because the mean of its divisors is an integer number (103036246).

Almost surely, 2^206072491 is an apocalyptic number.

206072491 is a deficient number, since it is larger than the sum of its proper divisors (1).

206072491 is an equidigital number, since it uses as much as digits as its factorization.

206072491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 206072491 is about 14355.2252159275. The cubic root of 206072491 is about 590.6633265388.

The spelling of 206072491 in words is "two hundred six million, seventy-two thousand, four hundred ninety-one".