6843491 has 2 divisors, whose sum is σ = 6843492. Its totient is φ = 6843490.

The previous prime is 6843479. The next prime is 6843497. The reversal of 6843491 is 1943486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6843491 - 2⁶ = 6843427 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6843497) 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, 3421745 + 3421746.

It is an arithmetic number, because the mean of its divisors is an integer number (3421746).

Almost surely, 2^6843491 is an apocalyptic number.

6843491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6843491 is an equidigital number, since it uses as much as digits as its factorization.

6843491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 6843491 is about 2616.0066895939. The cubic root of 6843491 is about 189.8566878677.

Subtracting from 6843491 its sum of digits (35), we obtain a square (6843456 = 2616²).

The spelling of 6843491 in words is "six million, eight hundred forty-three thousand, four hundred ninety-one".