7867997687 has 16 divisors (see below), whose sum is σ = 9010344960. Its totient is φ = 6804652800.

The previous prime is 7867997659. The next prime is 7867997693.

7867997687 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7867997687 - 2⁶ = 7867997623 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 (7867997617) 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, 175418 + ... + 215655.

It is an arithmetic number, because the mean of its divisors is an integer number (563146560).

Almost surely, 2^7867997687 is an apocalyptic number.

7867997687 is a deficient number, since it is larger than the sum of its proper divisors (1142347273).

7867997687 is a wasteful number, since it uses less digits than its factorization.

7867997687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391174.

The product of its digits is 448084224, while the sum is 74.

The square root of 7867997687 is about 88701.7344080712. The cubic root of 7867997687 is about 1988.9387443416.

The spelling of 7867997687 in words is "seven billion, eight hundred sixty-seven million, nine hundred ninety-seven thousand, six hundred eighty-seven".