7988249687 has 16 divisors (see below), whose sum is σ = 8751330720. Its totient is φ = 7231382400.

The previous prime is 7988249683. The next prime is 7988249741. The reversal of 7988249687 is 7869428897.

It is not a de Polignac number, because 7988249687 - 2² = 7988249683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7988249683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3859889 + ... + 3861957.

It is an arithmetic number, because the mean of its divisors is an integer number (546958170).

Almost surely, 2^7988249687 is an apocalyptic number.

7988249687 is a deficient number, since it is larger than the sum of its proper divisors (763081033).

7988249687 is a wasteful number, since it uses less digits than its factorization.

7988249687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394.

The product of its digits is 97542144, while the sum is 68.

The square root of 7988249687 is about 89377.0087158885. The cubic root of 7988249687 is about 1999.0203274492.

The spelling of 7988249687 in words is "seven billion, nine hundred eighty-eight million, two hundred forty-nine thousand, six hundred eighty-seven".