806171081 has 4 divisors (see below), whose sum is σ = 810392064. Its totient is φ = 801950100.

The previous prime is 806171077. The next prime is 806171099. The reversal of 806171081 is 180171608.

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 a cyclic number.

It is not a de Polignac number, because 806171081 - 2² = 806171077 is a prime.

It is a super-2 number, since 2×806171081² = 1299823623681417122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806171011) 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, 2110205 + ... + 2110586.

It is an arithmetic number, because the mean of its divisors is an integer number (202598016).

Almost surely, 2^806171081 is an apocalyptic number.

It is an amenable number.

806171081 is a deficient number, since it is larger than the sum of its proper divisors (4220983).

806171081 is a wasteful number, since it uses less digits than its factorization.

806171081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220982.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 806171081 is about 28393.1520088912. The cubic root of 806171081 is about 930.6986237058.

The spelling of 806171081 in words is "eight hundred six million, one hundred seventy-one thousand, eighty-one".