6978191043 has 4 divisors (see below), whose sum is σ = 9304254728. Its totient is φ = 4652127360.

The previous prime is 6978191041. The next prime is 6978191063. The reversal of 6978191043 is 3401918796.

It is a happy number.

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

It is not a de Polignac number, because 6978191043 - 2¹ = 6978191041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6978190983 and 6978191001.

It is not an unprimeable number, because it can be changed into a prime (6978191041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1163031838 + ... + 1163031843.

It is an arithmetic number, because the mean of its divisors is an integer number (2326063682).

Almost surely, 2^6978191043 is an apocalyptic number.

6978191043 is a deficient number, since it is larger than the sum of its proper divisors (2326063685).

6978191043 is a wasteful number, since it uses less digits than its factorization.

6978191043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326063684.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 6978191043 is about 83535.5675326385. The cubic root of 6978191043 is about 1910.9424953828.

The spelling of 6978191043 in words is "six billion, nine hundred seventy-eight million, one hundred ninety-one thousand, forty-three".