659887 has 4 divisors (see below), whose sum is σ = 668320. Its totient is φ = 651456.

The previous prime is 659881. The next prime is 659899. The reversal of 659887 is 788956.

It is a happy number.

659887 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 cyclic number.

It is not a de Polignac number, because 659887 - 2⁷ = 659759 is a prime.

It is a Duffinian number.

659887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659881) 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, 4098 + ... + 4255.

It is an arithmetic number, because the mean of its divisors is an integer number (167080).

2⁶⁵⁹⁸⁸⁷ is an apocalyptic number.

659887 is a deficient number, since it is larger than the sum of its proper divisors (8433).

659887 is an equidigital number, since it uses as much as digits as its factorization.

659887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8432.

The product of its digits is 120960, while the sum is 43.

The square root of 659887 is about 812.3342907941. The cubic root of 659887 is about 87.0609077170.

The spelling of 659887 in words is "six hundred fifty-nine thousand, eight hundred eighty-seven".