6891172 has 6 divisors (see below), whose sum is σ = 12059558. Its totient is φ = 3445584.

The previous prime is 6891169. The next prime is 6891173. The reversal of 6891172 is 2711986.

It is a happy number.

6891172 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4562496 + 2328676 = 2136^2 + 1526^2 .

It is not an unprimeable number, because it can be changed into a prime (6891173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861393 + ... + 861400.

Almost surely, 2^6891172 is an apocalyptic number.

It is an amenable number.

6891172 is a deficient number, since it is larger than the sum of its proper divisors (5168386).

6891172 is a wasteful number, since it uses less digits than its factorization.

6891172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722797 (or 1722795 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The square root of 6891172 is about 2625.1041884085. The cubic root of 6891172 is about 190.2966004613.

The spelling of 6891172 in words is "six million, eight hundred ninety-one thousand, one hundred seventy-two".