205395423 has 4 divisors (see below), whose sum is σ = 273860568. Its totient is φ = 136930280.

The previous prime is 205395413. The next prime is 205395433. The reversal of 205395423 is 324593502.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (205395413) and next prime (205395433).

It is a cyclic number.

It is not a de Polignac number, because 205395423 - 2⁹ = 205394911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205395413) 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 3 ways as a sum of consecutive naturals, for example, 34232568 + ... + 34232573.

It is an arithmetic number, because the mean of its divisors is an integer number (68465142).

Almost surely, 2^205395423 is an apocalyptic number.

205395423 is a deficient number, since it is larger than the sum of its proper divisors (68465145).

205395423 is an equidigital number, since it uses as much as digits as its factorization.

205395423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68465144.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 205395423 is about 14331.6231809241. The cubic root of 205395423 is about 590.0157259047.

The spelling of 205395423 in words is "two hundred five million, three hundred ninety-five thousand, four hundred twenty-three".