7869999687 has 16 divisors (see below), whose sum is σ = 11455385088. Its totient is φ = 4766316480.

The previous prime is 7869999629. The next prime is 7869999713.

It is a happy number.

7869999687 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7869999687 - 2⁷ = 7869999559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7869999617) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 36838 + ... + 130755.

It is an arithmetic number, because the mean of its divisors is an integer number (715961568).

Almost surely, 2^7869999687 is an apocalyptic number.

7869999687 is a deficient number, since it is larger than the sum of its proper divisors (3585385401).

7869999687 is a wasteful number, since it uses less digits than its factorization.

7869999687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169030.

The product of its digits is 740710656, while the sum is 78.

The square root of 7869999687 is about 88713.0187007521. The cubic root of 7869999687 is about 1989.1074241780.

The spelling of 7869999687 in words is "seven billion, eight hundred sixty-nine million, nine hundred ninety-nine thousand, six hundred eighty-seven".