205879349 has 6 divisors (see below), whose sum is σ = 222934626. Its totient is φ = 190042320.

The previous prime is 205879343. The next prime is 205879357. The reversal of 205879349 is 943978502.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 874225 + 205005124 = 935^2 + 14318^2 .

It is a de Polignac number, because none of the positive numbers 2^k-205879349 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 (205879343) 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 5 ways as a sum of consecutive naturals, for example, 608942 + ... + 609279.

It is an arithmetic number, because the mean of its divisors is an integer number (37155771).

Almost surely, 2^205879349 is an apocalyptic number.

It is an amenable number.

205879349 is a deficient number, since it is larger than the sum of its proper divisors (17055277).

205879349 is a wasteful number, since it uses less digits than its factorization.

205879349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218247 (or 1218234 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 205879349 is about 14348.4964020625. The cubic root of 205879349 is about 590.4787352566.

The spelling of 205879349 in words is "two hundred five million, eight hundred seventy-nine thousand, three hundred forty-nine".