205999029 has 12 divisors (see below), whose sum is σ = 299052000. Its totient is φ = 136641384.

The previous prime is 205999021. The next prime is 205999049. The reversal of 205999029 is 920999502.

It is not a de Polignac number, because 205999029 - 2³ = 205999021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205999021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55719 + ... + 59300.

It is an arithmetic number, because the mean of its divisors is an integer number (24921000).

Almost surely, 2^205999029 is an apocalyptic number.

It is an amenable number.

205999029 is a deficient number, since it is larger than the sum of its proper divisors (93052971).

205999029 is a wasteful number, since it uses less digits than its factorization.

205999029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115224 (or 115221 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 205999029 is about 14352.6662679796. Note that the first 3 decimals coincide. The cubic root of 205999029 is about 590.5931304211.

The spelling of 205999029 in words is "two hundred five million, nine hundred ninety-nine thousand, twenty-nine".