165170959 has 4 divisors (see below), whose sum is σ = 165647304. Its totient is φ = 164694616.

The previous prime is 165170953. The next prime is 165170983. The reversal of 165170959 is 959071561.

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-165170959 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 (165170953) 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, 237652 + ... + 238345.

It is an arithmetic number, because the mean of its divisors is an integer number (41411826).

Almost surely, 2^165170959 is an apocalyptic number.

165170959 is a deficient number, since it is larger than the sum of its proper divisors (476345).

165170959 is an equidigital number, since it uses as much as digits as its factorization.

165170959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476344.

The product of its (nonzero) digits is 85050, while the sum is 43.

The square root of 165170959 is about 12851.8854258821. The cubic root of 165170959 is about 548.6700195630.

The spelling of 165170959 in words is "one hundred sixty-five million, one hundred seventy thousand, nine hundred fifty-nine".