7971989796 has 81 divisors (see below), whose sum is σ = 21098270011. Its totient is φ = 2537865264.

The previous prime is 7971989761. The next prime is 7971989833. The reversal of 7971989796 is 6979891797.

The square root of 7971989796 is 89286.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 12321145 + ... + 12321791.

Almost surely, 2^7971989796 is an apocalyptic number.

7971989796 is the 89286-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7971989796

7971989796 is an abundant number, since it is smaller than the sum of its proper divisors (13126280215).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7971989796 is a wasteful number, since it uses less digits than its factorization.

7971989796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350 (or 675 counting only the distinct ones).

The product of its digits is 108020304, while the sum is 72.

The cubic root of 7971989796 is about 1997.6630868152.

The spelling of 7971989796 in words is "seven billion, nine hundred seventy-one million, nine hundred eighty-nine thousand, seven hundred ninety-six".