206240911 has 2 divisors, whose sum is σ = 206240912. Its totient is φ = 206240910.

The previous prime is 206240897. The next prime is 206240921. The reversal of 206240911 is 119042602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206240911 - 2¹⁵ = 206208143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206240921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103120455 + 103120456.

It is an arithmetic number, because the mean of its divisors is an integer number (103120456).

Almost surely, 2^206240911 is an apocalyptic number.

206240911 is a deficient number, since it is larger than the sum of its proper divisors (1).

206240911 is an equidigital number, since it uses as much as digits as its factorization.

206240911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 206240911 is about 14361.0901744958. The cubic root of 206240911 is about 590.8241961891.

The spelling of 206240911 in words is "two hundred six million, two hundred forty thousand, nine hundred eleven".