6911681 has 4 divisors (see below), whose sum is σ = 7899072. Its totient is φ = 5924292.

The previous prime is 6911647. The next prime is 6911683. The reversal of 6911681 is 1861196.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6911681 - 2¹⁴ = 6895297 is a prime.

It is a super-2 number, since 2×6911681² = 95542668491522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6911683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493685 + ... + 493698.

It is an arithmetic number, because the mean of its divisors is an integer number (1974768).

Almost surely, 2^6911681 is an apocalyptic number.

It is an amenable number.

6911681 is a deficient number, since it is larger than the sum of its proper divisors (987391).

6911681 is an equidigital number, since it uses as much as digits as its factorization.

6911681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987390.

The product of its digits is 2592, while the sum is 32.

The square root of 6911681 is about 2629.0076074443. The cubic root of 6911681 is about 190.4851957459.

The spelling of 6911681 in words is "six million, nine hundred eleven thousand, six hundred eighty-one".