205010999 has 2 divisors, whose sum is σ = 205011000. Its totient is φ = 205010998.

The previous prime is 205010987. The next prime is 205011013. The reversal of 205010999 is 999010502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205010999 - 2²⁴ = 188233783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205010959) 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, 102505499 + 102505500.

It is an arithmetic number, because the mean of its divisors is an integer number (102505500).

Almost surely, 2^205010999 is an apocalyptic number.

205010999 is a deficient number, since it is larger than the sum of its proper divisors (1).

205010999 is an equidigital number, since it uses as much as digits as its factorization.

205010999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 205010999 is about 14318.2051598655. The cubic root of 205010999 is about 589.6473991999.

The spelling of 205010999 in words is "two hundred five million, ten thousand, nine hundred ninety-nine".