209070683861 has 8 divisors (see below), whose sum is σ = 230389162080. Its totient is φ = 188500222512.

The previous prime is 209070683837. The next prime is 209070683897. The reversal of 209070683861 is 168386070902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209070683861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209070683461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187003631 + ... + 187004748.

It is an arithmetic number, because the mean of its divisors is an integer number (28798645260).

Almost surely, 2^209070683861 is an apocalyptic number.

It is an amenable number.

209070683861 is a deficient number, since it is larger than the sum of its proper divisors (21318478219).

209070683861 is a wasteful number, since it uses less digits than its factorization.

209070683861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374008435.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 209070683861 in words is "two hundred nine billion, seventy million, six hundred eighty-three thousand, eight hundred sixty-one".