659791 has 4 divisors (see below), whose sum is σ = 719784. Its totient is φ = 599800.

The previous prime is 659783. The next prime is 659819. The reversal of 659791 is 197956.

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 659791 - 2³ = 659783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 659791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659741) 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, 29980 + ... + 30001.

It is an arithmetic number, because the mean of its divisors is an integer number (179946).

2⁶⁵⁹⁷⁹¹ is an apocalyptic number.

659791 is a deficient number, since it is larger than the sum of its proper divisors (59993).

659791 is a wasteful number, since it uses less digits than its factorization.

659791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59992.

The product of its digits is 17010, while the sum is 37.

The square root of 659791 is about 812.2751996707. The cubic root of 659791 is about 87.0566856545.

The spelling of 659791 in words is "six hundred fifty-nine thousand, seven hundred ninety-one".