205049983 has 4 divisors (see below), whose sum is σ = 205094440. Its totient is φ = 205005528.

The previous prime is 205049953. The next prime is 205049987. The reversal of 205049983 is 389940502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205049983 - 2²¹ = 202952831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205049987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14388 + ... + 24841.

It is an arithmetic number, because the mean of its divisors is an integer number (51273610).

Almost surely, 2^205049983 is an apocalyptic number.

205049983 is a deficient number, since it is larger than the sum of its proper divisors (44457).

205049983 is an equidigital number, since it uses as much as digits as its factorization.

205049983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44456.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 205049983 is about 14319.5664389673. The cubic root of 205049983 is about 589.6847717595.

The spelling of 205049983 in words is "two hundred five million, forty-nine thousand, nine hundred eighty-three".