206266469 has 2 divisors, whose sum is σ = 206266470. Its totient is φ = 206266468.

The previous prime is 206266421. The next prime is 206266481. The reversal of 206266469 is 964662602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158130625 + 48135844 = 12575^2 + 6938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206266469 is a prime.

It is a super-2 number, since 2×206266469² = 85091712467455922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206266499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103133234 + 103133235.

It is an arithmetic number, because the mean of its divisors is an integer number (103133235).

Almost surely, 2^206266469 is an apocalyptic number.

It is an amenable number.

206266469 is a deficient number, since it is larger than the sum of its proper divisors (1).

206266469 is an equidigital number, since it uses as much as digits as its factorization.

206266469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 206266469 is about 14361.9799818827. The cubic root of 206266469 is about 590.8486007572.

The spelling of 206266469 in words is "two hundred six million, two hundred sixty-six thousand, four hundred sixty-nine".