165597359 has 4 divisors (see below), whose sum is σ = 166072200. Its totient is φ = 165122520.

The previous prime is 165597353. The next prime is 165597379. The reversal of 165597359 is 953795561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165597359 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 (165597353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236897 + ... + 237594.

It is an arithmetic number, because the mean of its divisors is an integer number (41518050).

Almost surely, 2^165597359 is an apocalyptic number.

165597359 is a deficient number, since it is larger than the sum of its proper divisors (474841).

165597359 is an equidigital number, since it uses as much as digits as its factorization.

165597359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474840.

The product of its digits is 1275750, while the sum is 50.

The square root of 165597359 is about 12868.4637389239. The cubic root of 165597359 is about 549.1417567744.

The spelling of 165597359 in words is "one hundred sixty-five million, five hundred ninety-seven thousand, three hundred fifty-nine".