7687997867 has 8 divisors (see below), whose sum is σ = 8422904880. Its totient is φ = 6959090560.

The previous prime is 7687997819. The next prime is 7687997869.

7687997867 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7687997867 is a prime.

It is a super-2 number, since 2×7687997867² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7687997794 and 7687997803.

It is not an unprimeable number, because it can be changed into a prime (7687997869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1497242 + ... + 1502367.

It is an arithmetic number, because the mean of its divisors is an integer number (1052863110).

Almost surely, 2^7687997867 is an apocalyptic number.

7687997867 is a deficient number, since it is larger than the sum of its proper divisors (734907013).

7687997867 is a wasteful number, since it uses less digits than its factorization.

7687997867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999853.

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

The square root of 7687997867 is about 87681.2287037539. The cubic root of 7687997867 is about 1973.6542981167.

The spelling of 7687997867 in words is "seven billion, six hundred eighty-seven million, nine hundred ninety-seven thousand, eight hundred sixty-seven".