7987171282 has 4 divisors (see below), whose sum is σ = 11980756926. Its totient is φ = 3993585640.

The previous prime is 7987171277. The next prime is 7987171321. The reversal of 7987171282 is 2821717897.

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

It can be written as a sum of positive squares in only one way, i.e., 6152676721 + 1834494561 = 78439^2 + 42831^2 .

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 as a sum of consecutive naturals, namely, 1996792819 + ... + 1996792822.

Almost surely, 2^7987171282 is an apocalyptic number.

7987171282 is a deficient number, since it is larger than the sum of its proper divisors (3993585644).

7987171282 is a wasteful number, since it uses less digits than its factorization.

7987171282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993585643.

The product of its digits is 790272, while the sum is 52.

The square root of 7987171282 is about 89370.9756128912. The cubic root of 7987171282 is about 1998.9303682126.

The spelling of 7987171282 in words is "seven billion, nine hundred eighty-seven million, one hundred seventy-one thousand, two hundred eighty-two".