6891972 has 24 divisors (see below), whose sum is σ = 16136736. Its totient is φ = 2289408.

The previous prime is 6891971. The next prime is 6891979. The reversal of 6891972 is 2791986.

It is not an unprimeable number, because it can be changed into a prime (6891971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3423 + ... + 5049.

It is an arithmetic number, because the mean of its divisors is an integer number (672364).

Almost surely, 2^6891972 is an apocalyptic number.

It is an amenable number.

6891972 is an abundant number, since it is smaller than the sum of its proper divisors (9244764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6891972 is a wasteful number, since it uses less digits than its factorization.

6891972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987 (or 1985 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 6891972 is about 2625.2565588910. The cubic root of 6891972 is about 190.3039640559.

The spelling of 6891972 in words is "six million, eight hundred ninety-one thousand, nine hundred seventy-two".