609591 has 8 divisors (see below), whose sum is σ = 816624. Its totient is φ = 404480.

The previous prime is 609589. The next prime is 609593. The reversal of 609591 is 195906.

It is an interprime number because it is at equal distance from previous prime (609589) and next prime (609593).

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 609591 - 2¹ = 609589 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631 + ... + 1271.

It is an arithmetic number, because the mean of its divisors is an integer number (102078).

2⁶⁰⁹⁵⁹¹ is an apocalyptic number.

609591 is a deficient number, since it is larger than the sum of its proper divisors (207033).

609591 is a wasteful number, since it uses less digits than its factorization.

609591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 609591 is about 780.7630882669. The cubic root of 609591 is about 84.7903020089.

The spelling of 609591 in words is "six hundred nine thousand, five hundred ninety-one".