6991967423 has 8 divisors (see below), whose sum is σ = 7991480448. Its totient is φ = 5992619544.

The previous prime is 6991967419. The next prime is 6991967459. The reversal of 6991967423 is 3247691996.

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

It is a cyclic number.

It is not a de Polignac number, because 6991967423 - 2² = 6991967419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991967413) 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 in 7 ways as a sum of consecutive naturals, for example, 69140 + ... + 136982.

It is an arithmetic number, because the mean of its divisors is an integer number (998935056).

Almost surely, 2^6991967423 is an apocalyptic number.

6991967423 is a deficient number, since it is larger than the sum of its proper divisors (999513025).

6991967423 is a wasteful number, since it uses less digits than its factorization.

6991967423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82573.

The product of its digits is 4408992, while the sum is 56.

The square root of 6991967423 is about 83617.9850450846. The cubic root of 6991967423 is about 1912.1991995232.

The spelling of 6991967423 in words is "six billion, nine hundred ninety-one million, nine hundred sixty-seven thousand, four hundred twenty-three".