6907891 has 2 divisors, whose sum is σ = 6907892. Its totient is φ = 6907890.

The previous prime is 6907877. The next prime is 6907909. The reversal of 6907891 is 1987096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6907891 - 2¹⁹ = 6383603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6907591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3453945 + 3453946.

It is an arithmetic number, because the mean of its divisors is an integer number (3453946).

Almost surely, 2^6907891 is an apocalyptic number.

6907891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6907891 is an equidigital number, since it uses as much as digits as its factorization.

6907891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 6907891 is about 2628.2867043000. The cubic root of 6907891 is about 190.4503720472.

It can be divided in two parts, 69078 and 91, that added together give a square (69169 = 263²).

The spelling of 6907891 in words is "six million, nine hundred seven thousand, eight hundred ninety-one".