205999349 has 8 divisors (see below), whose sum is σ = 217319040. Its totient is φ = 194727456.

The previous prime is 205999337. The next prime is 205999397. The reversal of 205999349 is 943999502.

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

It is a cyclic number.

It is not a de Polignac number, because 205999349 - 2²⁰ = 204950773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205999297 and 205999306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205999399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2912 + ... + 20505.

It is an arithmetic number, because the mean of its divisors is an integer number (27164880).

Almost surely, 2^205999349 is an apocalyptic number.

It is an amenable number.

205999349 is a deficient number, since it is larger than the sum of its proper divisors (11319691).

205999349 is a wasteful number, since it uses less digits than its factorization.

205999349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23899.

The product of its (nonzero) digits is 787320, while the sum is 50.

The square root of 205999349 is about 14352.6774157298. The cubic root of 205999349 is about 590.5934362312.

The spelling of 205999349 in words is "two hundred five million, nine hundred ninety-nine thousand, three hundred forty-nine".