6991108 has 12 divisors (see below), whose sum is σ = 12268620. Its totient is φ = 3485792.

The previous prime is 6991099. The next prime is 6991111. The reversal of 6991108 is 8011996.

It can be written as a sum of positive squares in 2 ways, for example, as 5008644 + 1982464 = 2238^2 + 1408^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691 + ... + 3802.

It is an arithmetic number, because the mean of its divisors is an integer number (1022385).

Almost surely, 2^6991108 is an apocalyptic number.

It is an amenable number.

6991108 is a deficient number, since it is larger than the sum of its proper divisors (5277512).

6991108 is a wasteful number, since it uses less digits than its factorization.

6991108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886 (or 4884 counting only the distinct ones).

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

The square root of 6991108 is about 2644.0703470218. The cubic root of 6991108 is about 191.2120849839.

Adding to 6991108 its product of nonzero digits (3888), we get a palindrome (6994996).

The spelling of 6991108 in words is "six million, nine hundred ninety-one thousand, one hundred eight".