809106199 has 4 divisors (see below), whose sum is σ = 882661320. Its totient is φ = 735551080.

The previous prime is 809106187. The next prime is 809106223. The reversal of 809106199 is 991601908.

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

It is not a de Polignac number, because 809106199 - 2¹³ = 809098007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809106139) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 36777544 + ... + 36777565.

It is an arithmetic number, because the mean of its divisors is an integer number (220665330).

Almost surely, 2^809106199 is an apocalyptic number.

809106199 is a deficient number, since it is larger than the sum of its proper divisors (73555121).

809106199 is a wasteful number, since it uses less digits than its factorization.

809106199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73555120.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 809106199 is about 28444.7921243942. The cubic root of 809106199 is about 931.8267555302.

The spelling of 809106199 in words is "eight hundred nine million, one hundred six thousand, one hundred ninety-nine".