6991103 has 16 divisors (see below), whose sum is σ = 8418816. Its totient is φ = 5676000.

The previous prime is 6991099. The next prime is 6991111. The reversal of 6991103 is 3011996.

It is a cyclic number.

It is not a de Polignac number, because 6991103 - 2² = 6991099 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27728 + ... + 27978.

It is an arithmetic number, because the mean of its divisors is an integer number (526176).

Almost surely, 2^6991103 is an apocalyptic number.

6991103 is a deficient number, since it is larger than the sum of its proper divisors (1427713).

6991103 is a wasteful number, since it uses less digits than its factorization.

6991103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 6991103 is about 2644.0694015097. The cubic root of 6991103 is about 191.2120393993.

The spelling of 6991103 in words is "six million, nine hundred ninety-one thousand, one hundred three".