687895213377 has 4 divisors (see below), whose sum is σ = 917193617840. Its totient is φ = 458596808916.

The previous prime is 687895213339. The next prime is 687895213393. The reversal of 687895213377 is 773312598786.

It is a happy number.

687895213377 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 687895213377 - 2²⁸ = 687626777921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687895213337) 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, 114649202227 + ... + 114649202232.

It is an arithmetic number, because the mean of its divisors is an integer number (229298404460).

Almost surely, 2^687895213377 is an apocalyptic number.

It is an amenable number.

687895213377 is a deficient number, since it is larger than the sum of its proper divisors (229298404463).

687895213377 is a wasteful number, since it uses less digits than its factorization.

687895213377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229298404462.

The product of its digits is 106686720, while the sum is 66.

The spelling of 687895213377 in words is "six hundred eighty-seven billion, eight hundred ninety-five million, two hundred thirteen thousand, three hundred seventy-seven".