806928181 has 4 divisors (see below), whose sum is σ = 808029772. Its totient is φ = 805826592.

The previous prime is 806928173. The next prime is 806928209. The reversal of 806928181 is 181829608.

806928181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 552015025 + 254913156 = 23495^2 + 15966^2 .

It is a cyclic number.

It is not a de Polignac number, because 806928181 - 2³ = 806928173 is a prime.

It is a super-2 number, since 2×806928181² = 1302266178583937522, which 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 (806928581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549696 + ... + 551161.

It is an arithmetic number, because the mean of its divisors is an integer number (202007443).

Almost surely, 2^806928181 is an apocalyptic number.

It is an amenable number.

806928181 is a deficient number, since it is larger than the sum of its proper divisors (1101591).

806928181 is a wasteful number, since it uses less digits than its factorization.

806928181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101590.

The product of its (nonzero) digits is 55296, while the sum is 43.

The square root of 806928181 is about 28406.4813202903. The cubic root of 806928181 is about 930.9898817606.

The spelling of 806928181 in words is "eight hundred six million, nine hundred twenty-eight thousand, one hundred eighty-one".