8491943 has 2 divisors, whose sum is σ = 8491944. Its totient is φ = 8491942.

The previous prime is 8491933. The next prime is 8491949. The reversal of 8491943 is 3491948.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8491943 - 2¹⁰ = 8490919 is a prime.

It is a super-2 number, since 2×8491943² = 144226191830498, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 8491897 and 8491906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8491949) 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 as a sum of consecutive naturals, namely, 4245971 + 4245972.

It is an arithmetic number, because the mean of its divisors is an integer number (4245972).

Almost surely, 2^8491943 is an apocalyptic number.

8491943 is a deficient number, since it is larger than the sum of its proper divisors (1).

8491943 is an equidigital number, since it uses as much as digits as its factorization.

8491943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 8491943 is about 2914.0938557294. The cubic root of 8491943 is about 204.0182525639.

The spelling of 8491943 in words is "eight million, four hundred ninety-one thousand, nine hundred forty-three".