809198853 has 4 divisors (see below), whose sum is σ = 1078931808. Its totient is φ = 539465900.

The previous prime is 809198839. The next prime is 809198867. The reversal of 809198853 is 358891908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (809198839) and next prime (809198867).

It is a cyclic number.

It is not a de Polignac number, because 809198853 - 2⁵ = 809198821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809198796 and 809198805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809198833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134866473 + ... + 134866478.

It is an arithmetic number, because the mean of its divisors is an integer number (269732952).

Almost surely, 2^809198853 is an apocalyptic number.

It is an amenable number.

809198853 is a deficient number, since it is larger than the sum of its proper divisors (269732955).

809198853 is a wasteful number, since it uses less digits than its factorization.

809198853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269732954.

The product of its (nonzero) digits is 622080, while the sum is 51.

The square root of 809198853 is about 28446.4207414571. The cubic root of 809198853 is about 931.8623232472.

The spelling of 809198853 in words is "eight hundred nine million, one hundred ninety-eight thousand, eight hundred fifty-three".