165917933 has 4 divisors (see below), whose sum is σ = 168018240. Its totient is φ = 163817628.

The previous prime is 165917923. The next prime is 165917957. The reversal of 165917933 is 339719561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165917933 - 2⁸ = 165917677 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 (165917923) 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, 1050035 + ... + 1050192.

It is an arithmetic number, because the mean of its divisors is an integer number (42004560).

Almost surely, 2^165917933 is an apocalyptic number.

It is an amenable number.

165917933 is a deficient number, since it is larger than the sum of its proper divisors (2100307).

165917933 is an equidigital number, since it uses as much as digits as its factorization.

165917933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100306.

The product of its digits is 153090, while the sum is 44.

The square root of 165917933 is about 12880.9135157410. The cubic root of 165917933 is about 549.4958829830.

The spelling of 165917933 in words is "one hundred sixty-five million, nine hundred seventeen thousand, nine hundred thirty-three".