6891133 has 2 divisors, whose sum is σ = 6891134. Its totient is φ = 6891132.

The previous prime is 6891119. The next prime is 6891149. The reversal of 6891133 is 3311986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5257849 + 1633284 = 2293^2 + 1278^2 .

It is a cyclic number.

It is not a de Polignac number, because 6891133 - 2²¹ = 4793981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6891095 and 6891104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6891173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3445566 + 3445567.

It is an arithmetic number, because the mean of its divisors is an integer number (3445567).

Almost surely, 2^6891133 is an apocalyptic number.

It is an amenable number.

6891133 is a deficient number, since it is larger than the sum of its proper divisors (1).

6891133 is an equidigital number, since it uses as much as digits as its factorization.

6891133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 6891133 is about 2625.0967601214. The cubic root of 6891133 is about 190.2962414715.

The spelling of 6891133 in words is "six million, eight hundred ninety-one thousand, one hundred thirty-three".