658687 has 4 divisors (see below), whose sum is σ = 664840. Its totient is φ = 652536.

The previous prime is 658681. The next prime is 658703. The reversal of 658687 is 786856.

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

It is a cyclic number.

It is not a de Polignac number, because 658687 - 2¹⁹ = 134399 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 (658681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2913 + ... + 3130.

It is an arithmetic number, because the mean of its divisors is an integer number (166210).

2⁶⁵⁸⁶⁸⁷ is an apocalyptic number.

658687 is a deficient number, since it is larger than the sum of its proper divisors (6153).

658687 is a wasteful number, since it uses less digits than its factorization.

658687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6152.

The product of its digits is 80640, while the sum is 40.

The square root of 658687 is about 811.5953425199. The cubic root of 658687 is about 87.0081024735.

The spelling of 658687 in words is "six hundred fifty-eight thousand, six hundred eighty-seven".