6991107 has 8 divisors (see below), whose sum is σ = 9812160. Its totient is φ = 4415400.

The previous prime is 6991099. The next prime is 6991111. The reversal of 6991107 is 7011996.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6991107 - 2³ = 6991099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6991147) 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 7 ways as a sum of consecutive naturals, for example, 61269 + ... + 61382.

It is an arithmetic number, because the mean of its divisors is an integer number (1226520).

Almost surely, 2^6991107 is an apocalyptic number.

6991107 is a deficient number, since it is larger than the sum of its proper divisors (2821053).

6991107 is a wasteful number, since it uses less digits than its factorization.

6991107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122673.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 6991107 is about 2644.0701579194. The cubic root of 6991107 is about 191.2120758670.

The spelling of 6991107 in words is "six million, nine hundred ninety-one thousand, one hundred seven".