6891901 has 2 divisors, whose sum is σ = 6891902. Its totient is φ = 6891900.

The previous prime is 6891887. The next prime is 6891917. The reversal of 6891901 is 1091986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6380676 + 511225 = 2526^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 6891901 - 2⁵ = 6891869 is a prime.

6891901 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6891931) 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, 3445950 + 3445951.

It is an arithmetic number, because the mean of its divisors is an integer number (3445951).

Almost surely, 2^6891901 is an apocalyptic number.

It is an amenable number.

6891901 is a deficient number, since it is larger than the sum of its proper divisors (1).

6891901 is an equidigital number, since it uses as much as digits as its factorization.

6891901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 6891901 is about 2625.2430363683. The cubic root of 6891901 is about 190.3033105599.

The spelling of 6891901 in words is "six million, eight hundred ninety-one thousand, nine hundred one".