687113777 has 16 divisors (see below), whose sum is σ = 827735040. Its totient is φ = 557193168.

The previous prime is 687113737. The next prime is 687113831. The reversal of 687113777 is 777311786.

It is not a de Polignac number, because 687113777 - 2⁸ = 687113521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687113737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106868 + ... + 113114.

It is an arithmetic number, because the mean of its divisors is an integer number (51733440).

Almost surely, 2^687113777 is an apocalyptic number.

It is an amenable number.

687113777 is a deficient number, since it is larger than the sum of its proper divisors (140621263).

687113777 is a wasteful number, since it uses less digits than its factorization.

687113777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100.

The product of its digits is 345744, while the sum is 47.

The square root of 687113777 is about 26212.8551859579. The cubic root of 687113777 is about 882.4217799365.

The spelling of 687113777 in words is "six hundred eighty-seven million, one hundred thirteen thousand, seven hundred seventy-seven".