205100099 has 2 divisors, whose sum is σ = 205100100. Its totient is φ = 205100098.

The previous prime is 205100069. The next prime is 205100111. The reversal of 205100099 is 990001502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205100099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205100009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102550049 + 102550050.

It is an arithmetic number, because the mean of its divisors is an integer number (102550050).

Almost surely, 2^205100099 is an apocalyptic number.

205100099 is a deficient number, since it is larger than the sum of its proper divisors (1).

205100099 is an equidigital number, since it uses as much as digits as its factorization.

205100099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 205100099 is about 14321.3162453735. The cubic root of 205100099 is about 589.7328092092.

The spelling of 205100099 in words is "two hundred five million, one hundred thousand, ninety-nine".