659191 has 4 divisors (see below), whose sum is σ = 709912. Its totient is φ = 608472.

The previous prime is 659189. The next prime is 659221. The reversal of 659191 is 191956.

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 659191 - 2¹ = 659189 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 (659101) 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, 25341 + ... + 25366.

It is an arithmetic number, because the mean of its divisors is an integer number (177478).

2⁶⁵⁹¹⁹¹ is an apocalyptic number.

659191 is a deficient number, since it is larger than the sum of its proper divisors (50721).

659191 is a wasteful number, since it uses less digits than its factorization.

659191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50720.

The product of its digits is 2430, while the sum is 31.

The square root of 659191 is about 811.9057827113. The cubic root of 659191 is about 87.0302884808.

The spelling of 659191 in words is "six hundred fifty-nine thousand, one hundred ninety-one".