809009331 has 16 divisors (see below), whose sum is σ = 1183575456. Its totient is φ = 488457216.

The previous prime is 809009297. The next prime is 809009351. The reversal of 809009331 is 133900908.

It is not a de Polignac number, because 809009331 - 2⁷ = 809009203 is a prime.

It is a super-2 number, since 2×809009331² = 1308992195290135122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 809009292 and 809009301.

It is not an unprimeable number, because it can be changed into a prime (809009351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193630 + ... + 197763.

It is an arithmetic number, because the mean of its divisors is an integer number (73973466).

Almost surely, 2^809009331 is an apocalyptic number.

809009331 is a deficient number, since it is larger than the sum of its proper divisors (374566125).

809009331 is a wasteful number, since it uses less digits than its factorization.

809009331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391462.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 809009331 is about 28443.0893364276. The cubic root of 809009331 is about 931.7895672531.

The spelling of 809009331 in words is "eight hundred nine million, nine thousand, three hundred thirty-one".