209808647373 has 32 divisors (see below), whose sum is σ = 311921999872. Its totient is φ = 124570353600.

The previous prime is 209808647351. The next prime is 209808647413. The reversal of 209808647373 is 373746808902.

209808647373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209808647373 - 2²⁰ = 209807598797 is a prime.

It is a super-2 number, since 2×209808647373² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209808647773) 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 31 ways as a sum of consecutive naturals, for example, 138036 + ... + 662322.

It is an arithmetic number, because the mean of its divisors is an integer number (9747562496).

Almost surely, 2^209808647373 is an apocalyptic number.

It is an amenable number.

209808647373 is a deficient number, since it is larger than the sum of its proper divisors (102113352499).

209808647373 is a wasteful number, since it uses less digits than its factorization.

209808647373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524665.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 209808647373 in words is "two hundred nine billion, eight hundred eight million, six hundred forty-seven thousand, three hundred seventy-three".