6991294699 has 2 divisors, whose sum is σ = 6991294700. Its totient is φ = 6991294698.

The previous prime is 6991294649. The next prime is 6991294759. The reversal of 6991294699 is 9964921996.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6991294699 - 2⁷ = 6991294571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6991294699.

It is not a weakly prime, because it can be changed into another prime (6991294649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495647349 + 3495647350.

It is an arithmetic number, because the mean of its divisors is an integer number (3495647350).

Almost surely, 2^6991294699 is an apocalyptic number.

6991294699 is a deficient number, since it is larger than the sum of its proper divisors (1).

6991294699 is an equidigital number, since it uses as much as digits as its factorization.

6991294699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17006112, while the sum is 64.

The square root of 6991294699 is about 83613.9623448142. The cubic root of 6991294699 is about 1912.1378708835.

The spelling of 6991294699 in words is "six billion, nine hundred ninety-one million, two hundred ninety-four thousand, six hundred ninety-nine".