209172594793 has 4 divisors (see below), whose sum is σ = 209198990080. Its totient is φ = 209146199508.

The previous prime is 209172594713. The next prime is 209172594817. The reversal of 209172594793 is 397495271902.

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 a de Polignac number, because none of the positive numbers 2^k-209172594793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209172594713) 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, 13185753 + ... + 13201606.

It is an arithmetic number, because the mean of its divisors is an integer number (52299747520).

Almost surely, 2^209172594793 is an apocalyptic number.

It is an amenable number.

209172594793 is a deficient number, since it is larger than the sum of its proper divisors (26395287).

209172594793 is an equidigital number, since it uses as much as digits as its factorization.

209172594793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26395286.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 209172594793 in words is "two hundred nine billion, one hundred seventy-two million, five hundred ninety-four thousand, seven hundred ninety-three".