165740189 has 8 divisors (see below), whose sum is σ = 173205120. Its totient is φ = 158439456.

The previous prime is 165740177. The next prime is 165740203. The reversal of 165740189 is 981047561.

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 165740189 - 2¹² = 165736093 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 (165740129) 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 7 ways as a sum of consecutive naturals, for example, 38984 + ... + 43025.

It is an arithmetic number, because the mean of its divisors is an integer number (21650640).

Almost surely, 2^165740189 is an apocalyptic number.

It is an amenable number.

165740189 is a deficient number, since it is larger than the sum of its proper divisors (7464931).

165740189 is an equidigital number, since it uses as much as digits as its factorization.

165740189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82099.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 165740189 is about 12874.0121562782. The cubic root of 165740189 is about 549.2995921777.

The spelling of 165740189 in words is "one hundred sixty-five million, seven hundred forty thousand, one hundred eighty-nine".