808086991 has 8 divisors (see below), whose sum is σ = 844230240. Its totient is φ = 772027872.

The previous prime is 808086977. The next prime is 808087009. The reversal of 808086991 is 199680808.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 808086991 - 2¹¹ = 808084943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808086931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 976 + ... + 40213.

It is an arithmetic number, because the mean of its divisors is an integer number (105528780).

Almost surely, 2^808086991 is an apocalyptic number.

808086991 is a deficient number, since it is larger than the sum of its proper divisors (36143249).

808086991 is a wasteful number, since it uses less digits than its factorization.

808086991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42065.

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 808086991 is about 28426.8709322711. The cubic root of 808086991 is about 931.4353259318.

The spelling of 808086991 in words is "eight hundred eight million, eighty-six thousand, nine hundred ninety-one".