659345 has 8 divisors (see below), whose sum is σ = 837864. Its totient is φ = 496384.

The previous prime is 659333. The next prime is 659353. The reversal of 659345 is 543956.

It is a happy number.

It is a Cunningham number, because it is equal to 812²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 238144 + 421201 = 488^2 + 649^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 659345 - 2¹⁰ = 658321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3794 + ... + 3963.

It is an arithmetic number, because the mean of its divisors is an integer number (104733).

2⁶⁵⁹³⁴⁵ is an apocalyptic number.

It is an amenable number.

659345 is a deficient number, since it is larger than the sum of its proper divisors (178519).

659345 is a wasteful number, since it uses less digits than its factorization.

659345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7779.

The product of its digits is 16200, while the sum is 32.

The square root of 659345 is about 812.0006157633. Note that the first 3 decimals coincide. The cubic root of 659345 is about 87.0370652829.

The spelling of 659345 in words is "six hundred fifty-nine thousand, three hundred forty-five".