206269969 has 2 divisors, whose sum is σ = 206269970. Its totient is φ = 206269968.

The previous prime is 206269961. The next prime is 206269991. The reversal of 206269969 is 969962602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195300625 + 10969344 = 13975^2 + 3312^2 .

It is a cyclic number.

It is not a de Polignac number, because 206269969 - 2³ = 206269961 is a prime.

It is a super-2 number, since 2×206269969² = 85094600222521922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206269961) 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, 103134984 + 103134985.

It is an arithmetic number, because the mean of its divisors is an integer number (103134985).

Almost surely, 2^206269969 is an apocalyptic number.

It is an amenable number.

206269969 is a deficient number, since it is larger than the sum of its proper divisors (1).

206269969 is an equidigital number, since it uses as much as digits as its factorization.

206269969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 206269969 is about 14362.1018308603. The cubic root of 206269969 is about 590.8519426454.

The spelling of 206269969 in words is "two hundred six million, two hundred sixty-nine thousand, nine hundred sixty-nine".