209308402085 has 8 divisors (see below), whose sum is σ = 251742226560. Its totient is φ = 167065292304.

The previous prime is 209308402033. The next prime is 209308402151. The reversal of 209308402085 is 580204803902.

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

It is a cyclic number.

It is not a de Polignac number, because 209308402085 - 2¹⁰ = 209308401061 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47676257 + ... + 47680646.

It is an arithmetic number, because the mean of its divisors is an integer number (31467778320).

Almost surely, 2^209308402085 is an apocalyptic number.

It is an amenable number.

209308402085 is a deficient number, since it is larger than the sum of its proper divisors (42433824475).

209308402085 is an equidigital number, since it uses as much as digits as its factorization.

209308402085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95357347.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 209308402085 in words is "two hundred nine billion, three hundred eight million, four hundred two thousand, eighty-five".