205979672 has 16 divisors (see below), whose sum is σ = 386599200. Its totient is φ = 102886560.

The previous prime is 205979671. The next prime is 205979681. The reversal of 205979672 is 276979502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205979671) 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, 4079 + ... + 20702.

It is an arithmetic number, because the mean of its divisors is an integer number (24162450).

Almost surely, 2^205979672 is an apocalyptic number.

It is an amenable number.

205979672 is a deficient number, since it is larger than the sum of its proper divisors (180619528).

205979672 is a wasteful number, since it uses less digits than its factorization.

205979672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25826 (or 25822 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 205979672 is about 14351.9919175005. The cubic root of 205979672 is about 590.5746311926.

The spelling of 205979672 in words is "two hundred five million, nine hundred seventy-nine thousand, six hundred seventy-two".