165943673 has 8 divisors (see below), whose sum is σ = 192248448. Its totient is φ = 140288544.

The previous prime is 165943649. The next prime is 165943697. The reversal of 165943673 is 376349561.

It is a happy number.

165943673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165943649) and next prime (165943697).

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 165943673 - 2²⁰ = 164895097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165943633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161861 + ... + 162882.

It is an arithmetic number, because the mean of its divisors is an integer number (24031056).

Almost surely, 2^165943673 is an apocalyptic number.

It is an amenable number.

165943673 is a deficient number, since it is larger than the sum of its proper divisors (26304775).

165943673 is an equidigital number, since it uses as much as digits as its factorization.

165943673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324823.

The product of its digits is 408240, while the sum is 44.

The square root of 165943673 is about 12881.9126297301. The cubic root of 165943673 is about 549.5242972165.

The spelling of 165943673 in words is "one hundred sixty-five million, nine hundred forty-three thousand, six hundred seventy-three".