6991227 has 12 divisors (see below), whose sum is σ = 10122840. Its totient is φ = 4649568.

The previous prime is 6991147. The next prime is 6991253. The reversal of 6991227 is 7221996.

It is not a de Polignac number, because 6991227 - 2⁷ = 6991099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6991191 and 6991200.

It is not an unprimeable number, because it can be changed into a prime (6991277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4924 + ... + 6182.

It is an arithmetic number, because the mean of its divisors is an integer number (843570).

Almost surely, 2^6991227 is an apocalyptic number.

6991227 is a deficient number, since it is larger than the sum of its proper divisors (3131613).

6991227 is a wasteful number, since it uses less digits than its factorization.

6991227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882 (or 1879 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 6991227 is about 2644.0928501095. The cubic root of 6991227 is about 191.2131698911.

The spelling of 6991227 in words is "six million, nine hundred ninety-one thousand, two hundred twenty-seven".