6891764 has 12 divisors (see below), whose sum is σ = 13157088. Its totient is φ = 3132600.

The previous prime is 6891733. The next prime is 6891769. The reversal of 6891764 is 4671986.

6891764 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×6891764² = 94992822063392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6891769) 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 in 3 ways as a sum of consecutive naturals, for example, 78272 + ... + 78359.

It is an arithmetic number, because the mean of its divisors is an integer number (1096424).

Almost surely, 2^6891764 is an apocalyptic number.

It is an amenable number.

6891764 is a deficient number, since it is larger than the sum of its proper divisors (6265324).

6891764 is a wasteful number, since it uses less digits than its factorization.

6891764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156646 (or 156644 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 6891764 is about 2625.2169434163. The cubic root of 6891764 is about 190.3020495761.

The spelling of 6891764 in words is "six million, eight hundred ninety-one thousand, seven hundred sixty-four".