206107969 has 2 divisors, whose sum is σ = 206107970. Its totient is φ = 206107968.

The previous prime is 206107963. The next prime is 206108009. The reversal of 206107969 is 969701602.

It is an a-pointer prime, because the next prime (206108009) can be obtained adding 206107969 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119617969 + 86490000 = 10937^2 + 9300^2 .

It is a cyclic number.

It is not a de Polignac number, because 206107969 - 2³ = 206107961 is a prime.

It is a super-2 number, since 2×206107969² = 84960989770609922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206107961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103053984 + 103053985.

It is an arithmetic number, because the mean of its divisors is an integer number (103053985).

Almost surely, 2^206107969 is an apocalyptic number.

It is an amenable number.

206107969 is a deficient number, since it is larger than the sum of its proper divisors (1).

206107969 is an equidigital number, since it uses as much as digits as its factorization.

206107969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 206107969 is about 14356.4608800359. The cubic root of 206107969 is about 590.6972213281.

The spelling of 206107969 in words is "two hundred six million, one hundred seven thousand, nine hundred sixty-nine".