687632774 has 4 divisors (see below), whose sum is σ = 1031449164. Its totient is φ = 343816386.

The previous prime is 687632773. The next prime is 687632797. The reversal of 687632774 is 477236786.

687632774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687632773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171908192 + ... + 171908195.

It is an arithmetic number, because the mean of its divisors is an integer number (257862291).

Almost surely, 2^687632774 is an apocalyptic number.

687632774 is a deficient number, since it is larger than the sum of its proper divisors (343816390).

687632774 is a wasteful number, since it uses less digits than its factorization.

687632774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343816389.

The product of its digits is 2370816, while the sum is 50.

The square root of 687632774 is about 26222.7529828582. The cubic root of 687632774 is about 882.6438969585.

The spelling of 687632774 in words is "six hundred eighty-seven million, six hundred thirty-two thousand, seven hundred seventy-four".