7947911879 has 8 divisors (see below), whose sum is σ = 8038491552. Its totient is φ = 7857590400.

The previous prime is 7947911863. The next prime is 7947911887. The reversal of 7947911879 is 9781197497.

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 7947911879 - 2⁴ = 7947911863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7947911899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2294 + ... + 126099.

It is an arithmetic number, because the mean of its divisors is an integer number (1004811444).

Almost surely, 2^7947911879 is an apocalyptic number.

7947911879 is a deficient number, since it is larger than the sum of its proper divisors (90579673).

7947911879 is a wasteful number, since it uses less digits than its factorization.

7947911879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129097.

The product of its digits is 8001504, while the sum is 62.

The square root of 7947911879 is about 89151.0621305209. The cubic root of 7947911879 is about 1995.6498682871.

The spelling of 7947911879 in words is "seven billion, nine hundred forty-seven million, nine hundred eleven thousand, eight hundred seventy-nine".