6998091 has 4 divisors (see below), whose sum is σ = 9330792. Its totient is φ = 4665392.

The previous prime is 6998087. The next prime is 6998093. The reversal of 6998091 is 1908996.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6998091 - 2² = 6998087 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6998093) 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 3 ways as a sum of consecutive naturals, for example, 1166346 + ... + 1166351.

It is an arithmetic number, because the mean of its divisors is an integer number (2332698).

Almost surely, 2^6998091 is an apocalyptic number.

6998091 is a deficient number, since it is larger than the sum of its proper divisors (2332701).

6998091 is a wasteful number, since it uses less digits than its factorization.

6998091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332700.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 6998091 is about 2645.3905193752. The cubic root of 6998091 is about 191.2757272408.

The spelling of 6998091 in words is "six million, nine hundred ninety-eight thousand, ninety-one".