206161633 has 2 divisors, whose sum is σ = 206161634. Its totient is φ = 206161632.

The previous prime is 206161591. The next prime is 206161663. The reversal of 206161633 is 336161602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205262929 + 898704 = 14327^2 + 948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206161633 is a prime.

It is not a weakly prime, because it can be changed into another prime (206161663) 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, 103080816 + 103080817.

It is an arithmetic number, because the mean of its divisors is an integer number (103080817).

Almost surely, 2^206161633 is an apocalyptic number.

It is an amenable number.

206161633 is a deficient number, since it is larger than the sum of its proper divisors (1).

206161633 is an equidigital number, since it uses as much as digits as its factorization.

206161633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 206161633 is about 14358.3297426964. The cubic root of 206161633 is about 590.7484831742.

The spelling of 206161633 in words is "two hundred six million, one hundred sixty-one thousand, six hundred thirty-three".