209324191073 has 4 divisors (see below), whose sum is σ = 210238270740. Its totient is φ = 208410111408.

The previous prime is 209324191051. The next prime is 209324191099. The reversal of 209324191073 is 370191423902.

209324191073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 147069949009 + 62254242064 = 383497^2 + 249508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209324191073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 209324191073.

It is not an unprimeable number, because it can be changed into a prime (209324191003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457039490 + ... + 457039947.

It is an arithmetic number, because the mean of its divisors is an integer number (52559567685).

Almost surely, 2^209324191073 is an apocalyptic number.

It is an amenable number.

209324191073 is a deficient number, since it is larger than the sum of its proper divisors (914079667).

209324191073 is an equidigital number, since it uses as much as digits as its factorization.

209324191073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914079666.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 209324191073 in words is "two hundred nine billion, three hundred twenty-four million, one hundred ninety-one thousand, seventy-three".