806349881 has 4 divisors (see below), whose sum is σ = 806417664. Its totient is φ = 806282100.

The previous prime is 806349877. The next prime is 806349913. The reversal of 806349881 is 188943608.

806349881 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 806349881 - 2² = 806349877 is a prime.

It is a super-2 number, since 2×806349881² = 1300400261177428322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806349811) 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, 10805 + ... + 41586.

It is an arithmetic number, because the mean of its divisors is an integer number (201604416).

Almost surely, 2^806349881 is an apocalyptic number.

It is an amenable number.

806349881 is a deficient number, since it is larger than the sum of its proper divisors (67783).

806349881 is a wasteful number, since it uses less digits than its factorization.

806349881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67782.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 806349881 is about 28396.3004808725. The cubic root of 806349881 is about 930.7674249056.

The spelling of 806349881 in words is "eight hundred six million, three hundred forty-nine thousand, eight hundred eighty-one".