659705 has 4 divisors (see below), whose sum is σ = 791652. Its totient is φ = 527760.

The previous prime is 659693. The next prime is 659713. The reversal of 659705 is 507956.

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

It can be written as a sum of positive squares in 2 ways, for example, as 222784 + 436921 = 472^2 + 661^2 .

It is not a de Polignac number, because 659705 - 2⁴ = 659689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65966 + ... + 65975.

It is an arithmetic number, because the mean of its divisors is an integer number (197913).

2⁶⁵⁹⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

659705 is a deficient number, since it is larger than the sum of its proper divisors (131947).

659705 is a wasteful number, since it uses less digits than its factorization.

659705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131946.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 659705 is about 812.2222602219. Note that the first 4 decimals coincide. The cubic root of 659705 is about 87.0529030424.

The spelling of 659705 in words is "six hundred fifty-nine thousand, seven hundred five".