609687 has 24 divisors (see below), whose sum is σ = 988624. Its totient is φ = 373248.

The previous prime is 609683. The next prime is 609701. The reversal of 609687 is 786906.

It is not a de Polignac number, because 609687 - 2² = 609683 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609683) by changing a digit.

It is a Kaprekar number, because its square (371718237969) can be partitioned into two parts whose sum is 609687.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3063 + ... + 3255.

2⁶⁰⁹⁶⁸⁷ is an apocalyptic number.

609687 is a deficient number, since it is larger than the sum of its proper divisors (378937).

609687 is a wasteful number, since it uses less digits than its factorization.

609687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 609687 is about 780.8245641628. The cubic root of 609687 is about 84.7947527755.

It can be divided in two parts, 609 and 687, that added together give a 4-th power (1296 = 6⁴).

The spelling of 609687 in words is "six hundred nine thousand, six hundred eighty-seven".