7987108769 has 4 divisors (see below), whose sum is σ = 7991901744. Its totient is φ = 7982315796.

The previous prime is 7987108751. The next prime is 7987108781. The reversal of 7987108769 is 9678017897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7987108769 - 2¹² = 7987104673 is a prime.

It is a super-2 number, since 2×7987108769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7987108729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2393987 + ... + 2397320.

It is an arithmetic number, because the mean of its divisors is an integer number (1997975436).

Almost surely, 2^7987108769 is an apocalyptic number.

It is an amenable number.

7987108769 is a deficient number, since it is larger than the sum of its proper divisors (4792975).

7987108769 is a wasteful number, since it uses less digits than its factorization.

7987108769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792974.

The product of its (nonzero) digits is 10668672, while the sum is 62.

The square root of 7987108769 is about 89370.6258733819. The cubic root of 7987108769 is about 1998.9251532057.

The spelling of 7987108769 in words is "seven billion, nine hundred eighty-seven million, one hundred eight thousand, seven hundred sixty-nine".