205097669 has 4 divisors (see below), whose sum is σ = 234397344. Its totient is φ = 175797996.

The previous prime is 205097593. The next prime is 205097671. The reversal of 205097669 is 966790502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205097669 - 2⁸ = 205097413 is a prime.

It is a super-3 number, since 3×205097669³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205097689) 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 3 ways as a sum of consecutive naturals, for example, 14649827 + ... + 14649840.

It is an arithmetic number, because the mean of its divisors is an integer number (58599336).

Almost surely, 2^205097669 is an apocalyptic number.

It is an amenable number.

205097669 is a deficient number, since it is larger than the sum of its proper divisors (29299675).

205097669 is an equidigital number, since it uses as much as digits as its factorization.

205097669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29299674.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 205097669 is about 14321.2314065516. The cubic root of 205097669 is about 589.7304801734.

The spelling of 205097669 in words is "two hundred five million, ninety-seven thousand, six hundred sixty-nine".