205499934 has 24 divisors (see below), whose sum is σ = 468684840. Its totient is φ = 64894608.

The previous prime is 205499923. The next prime is 205499939. The reversal of 205499934 is 439994502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 205499934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205499939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300097 + ... + 300780.

It is an arithmetic number, because the mean of its divisors is an integer number (19528535).

Almost surely, 2^205499934 is an apocalyptic number.

205499934 is an abundant number, since it is smaller than the sum of its proper divisors (263184906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205499934 is a wasteful number, since it uses less digits than its factorization.

205499934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600904 (or 600901 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 205499934 is about 14335.2688848169. The cubic root of 205499934 is about 590.1157811655.

The spelling of 205499934 in words is "two hundred five million, four hundred ninety-nine thousand, nine hundred thirty-four".