687602 has 4 divisors (see below), whose sum is σ = 1031406. Its totient is φ = 343800.

The previous prime is 687593. The next prime is 687623. The reversal of 687602 is 206786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 206786 = 2 ⋅103393.

It can be written as a sum of positive squares in only one way, i.e., 687241 + 361 = 829^2 + 19^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 171899 + ... + 171902.

2⁶⁸⁷⁶⁰² is an apocalyptic number.

687602 is a deficient number, since it is larger than the sum of its proper divisors (343804).

687602 is a wasteful number, since it uses less digits than its factorization.

687602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343803.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 687602 is about 829.2177036219. The cubic root of 687602 is about 88.2630729616.

The spelling of 687602 in words is "six hundred eighty-seven thousand, six hundred two".