806408691 has 8 divisors (see below), whose sum is σ = 1172958144. Its totient is φ = 488732520.

The previous prime is 806408683. The next prime is 806408693. The reversal of 806408691 is 196804608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 806408691 - 2³ = 806408683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (806408693) 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 7 ways as a sum of consecutive naturals, for example, 12218281 + ... + 12218346.

It is an arithmetic number, because the mean of its divisors is an integer number (146619768).

Almost surely, 2^806408691 is an apocalyptic number.

806408691 is a deficient number, since it is larger than the sum of its proper divisors (366549453).

806408691 is a wasteful number, since it uses less digits than its factorization.

806408691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24436641.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 806408691 is about 28397.3359842081. The cubic root of 806408691 is about 930.7900524287.

The spelling of 806408691 in words is "eight hundred six million, four hundred eight thousand, six hundred ninety-one".