7971969859 has 12 divisors (see below), whose sum is σ = 9615580464. Its totient is φ = 6473477232.

The previous prime is 7971969787. The next prime is 7971969883. The reversal of 7971969859 is 9589691797.

It is a de Polignac number, because none of the positive numbers 2^k-7971969859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7971969899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1574832 + ... + 1579885.

It is an arithmetic number, because the mean of its divisors is an integer number (801298372).

Almost surely, 2^7971969859 is an apocalyptic number.

7971969859 is a deficient number, since it is larger than the sum of its proper divisors (1643610605).

7971969859 is a wasteful number, since it uses less digits than its factorization.

7971969859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154762 (or 3154743 counting only the distinct ones).

The product of its digits is 77157360, while the sum is 70.

The square root of 7971969859 is about 89285.8883530875. Note that the first 3 decimals coincide. The cubic root of 7971969859 is about 1997.6614215078.

The spelling of 7971969859 in words is "seven billion, nine hundred seventy-one million, nine hundred sixty-nine thousand, eight hundred fifty-nine".