206924881 has 2 divisors, whose sum is σ = 206924882. Its totient is φ = 206924880.

The previous prime is 206924873. The next prime is 206924917. The reversal of 206924881 is 188429602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145443600 + 61481281 = 12060^2 + 7841^2 .

It is a cyclic number.

It is not a de Polignac number, because 206924881 - 2³ = 206924873 is a prime.

It is a super-2 number, since 2×206924881² = 85635812753728322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206924281) 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, 103462440 + 103462441.

It is an arithmetic number, because the mean of its divisors is an integer number (103462441).

Almost surely, 2^206924881 is an apocalyptic number.

It is an amenable number.

206924881 is a deficient number, since it is larger than the sum of its proper divisors (1).

206924881 is an equidigital number, since it uses as much as digits as its factorization.

206924881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 206924881 is about 14384.8837673441. The cubic root of 206924881 is about 591.4766049406.

The spelling of 206924881 in words is "two hundred six million, nine hundred twenty-four thousand, eight hundred eighty-one".