7987717871 has 8 divisors (see below), whose sum is σ = 9231392160. Its totient is φ = 6769686528.

The previous prime is 7987717861. The next prime is 7987717901. The reversal of 7987717871 is 1787177897.

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 7987717871 - 2²⁶ = 7920609007 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 (7987717811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6410066 + ... + 6411311.

It is an arithmetic number, because the mean of its divisors is an integer number (1153924020).

Almost surely, 2^7987717871 is an apocalyptic number.

7987717871 is a deficient number, since it is larger than the sum of its proper divisors (1243674289).

7987717871 is a wasteful number, since it uses less digits than its factorization.

7987717871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12821473.

The product of its digits is 9680832, while the sum is 62.

The square root of 7987717871 is about 89374.0335388305. The cubic root of 7987717871 is about 1998.9759650157.

The spelling of 7987717871 in words is "seven billion, nine hundred eighty-seven million, seven hundred seventeen thousand, eight hundred seventy-one".