205793297123 has 4 divisors (see below), whose sum is σ = 205796481528. Its totient is φ = 205790112720.

The previous prime is 205793297119. The next prime is 205793297131. The reversal of 205793297123 is 321792397502.

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

It is a cyclic number.

It is not a de Polignac number, because 205793297123 - 2² = 205793297119 is a prime.

It is a super-2 number, since 2×205793297123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205793290123) 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, 1493213 + ... + 1625198.

It is an arithmetic number, because the mean of its divisors is an integer number (51449120382).

Almost surely, 2^205793297123 is an apocalyptic number.

205793297123 is a deficient number, since it is larger than the sum of its proper divisors (3184405).

205793297123 is an equidigital number, since it uses as much as digits as its factorization.

205793297123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184404.

The product of its (nonzero) digits is 1428840, while the sum is 50.

The spelling of 205793297123 in words is "two hundred five billion, seven hundred ninety-three million, two hundred ninety-seven thousand, one hundred twenty-three".