205993099 has 8 divisors (see below), whose sum is σ = 223993952. Its totient is φ = 188300160.

The previous prime is 205993069. The next prime is 205993121. The reversal of 205993099 is 990399502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205993099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205993019) 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 in 7 ways as a sum of consecutive naturals, for example, 75582 + ... + 78259.

It is an arithmetic number, because the mean of its divisors is an integer number (27999244).

Almost surely, 2^205993099 is an apocalyptic number.

205993099 is a deficient number, since it is larger than the sum of its proper divisors (18000853).

205993099 is a wasteful number, since it uses less digits than its factorization.

205993099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153957.

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 205993099 is about 14352.4596846673. The cubic root of 205993099 is about 590.5874633218.

The spelling of 205993099 in words is "two hundred five million, nine hundred ninety-three thousand, ninety-nine".