687117915467 has 4 divisors (see below), whose sum is σ = 710811636720. Its totient is φ = 663424194216.

The previous prime is 687117915439. The next prime is 687117915527. The reversal of 687117915467 is 764519711786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 764519711786 = 2 ⋅382259855893.

It is a cyclic number.

It is not a de Polignac number, because 687117915467 - 2⁶ = 687117915403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687117917467) 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, 11846860583 + ... + 11846860640.

It is an arithmetic number, because the mean of its divisors is an integer number (177702909180).

Almost surely, 2^687117915467 is an apocalyptic number.

687117915467 is a deficient number, since it is larger than the sum of its proper divisors (23693721253).

687117915467 is a wasteful number, since it uses less digits than its factorization.

687117915467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23693721252.

The product of its digits is 17781120, while the sum is 62.

The spelling of 687117915467 in words is "six hundred eighty-seven billion, one hundred seventeen million, nine hundred fifteen thousand, four hundred sixty-seven".