8091931 has 2 divisors, whose sum is σ = 8091932. Its totient is φ = 8091930.

The previous prime is 8091913. The next prime is 8091959. The reversal of 8091931 is 1391908.

Together with previous prime (8091913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8091931 - 2⁷ = 8091803 is a prime.

It is a super-2 number, since 2×8091931² = 130958694617522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8091893 and 8091902.

It is not a weakly prime, because it can be changed into another prime (8091901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045965 + 4045966.

It is an arithmetic number, because the mean of its divisors is an integer number (4045966).

Almost surely, 2^8091931 is an apocalyptic number.

8091931 is a deficient number, since it is larger than the sum of its proper divisors (1).

8091931 is an equidigital number, since it uses as much as digits as its factorization.

8091931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 8091931 is about 2844.6319621350. The cubic root of 8091931 is about 200.7631757762.

The spelling of 8091931 in words is "eight million, ninety-one thousand, nine hundred thirty-one".