206040169 has 2 divisors, whose sum is σ = 206040170. Its totient is φ = 206040168.

The previous prime is 206040089. The next prime is 206040217. The reversal of 206040169 is 961040602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118374400 + 87665769 = 10880^2 + 9363^2 .

It is a cyclic number.

It is not a de Polignac number, because 206040169 - 2¹⁹ = 205515881 is a prime.

It is a super-2 number, since 2×206040169² = 84905102483097122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206040869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103020084 + 103020085.

It is an arithmetic number, because the mean of its divisors is an integer number (103020085).

Almost surely, 2^206040169 is an apocalyptic number.

It is an amenable number.

206040169 is a deficient number, since it is larger than the sum of its proper divisors (1).

206040169 is an equidigital number, since it uses as much as digits as its factorization.

206040169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 206040169 is about 14354.0993796197. The cubic root of 206040169 is about 590.6324435257.

The spelling of 206040169 in words is "two hundred six million, forty thousand, one hundred sixty-nine".