659687 has 6 divisors (see below), whose sum is σ = 767448. Its totient is φ = 565404.

The previous prime is 659671. The next prime is 659689. The reversal of 659687 is 786956.

It is a happy number.

It is not a de Polignac number, because 659687 - 2⁴ = 659671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6683 + ... + 6780.

It is an arithmetic number, because the mean of its divisors is an integer number (127908).

2⁶⁵⁹⁶⁸⁷ is an apocalyptic number.

659687 is a deficient number, since it is larger than the sum of its proper divisors (107761).

659687 is a wasteful number, since it uses less digits than its factorization.

659687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13477 (or 13470 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 659687 is about 812.2111794355. The cubic root of 659687 is about 87.0521112912.

The spelling of 659687 in words is "six hundred fifty-nine thousand, six hundred eighty-seven".