205945197 has 8 divisors (see below), whose sum is σ = 286532544. Its totient is φ = 131327328.

The previous prime is 205945193. The next prime is 205945213. The reversal of 205945197 is 791549502.

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

It is not a de Polignac number, because 205945197 - 2² = 205945193 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205945193) 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, 1492288 + ... + 1492425.

It is an arithmetic number, because the mean of its divisors is an integer number (35816568).

Almost surely, 2^205945197 is an apocalyptic number.

It is an amenable number.

205945197 is a deficient number, since it is larger than the sum of its proper divisors (80587347).

205945197 is a wasteful number, since it uses less digits than its factorization.

205945197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984739.

The product of its (nonzero) digits is 113400, while the sum is 42.

The square root of 205945197 is about 14350.7908144464. The cubic root of 205945197 is about 590.5416810214.

The spelling of 205945197 in words is "two hundred five million, nine hundred forty-five thousand, one hundred ninety-seven".