165433091 has 4 divisors (see below), whose sum is σ = 168952992. Its totient is φ = 161913192.

The previous prime is 165433013. The next prime is 165433123. The reversal of 165433091 is 190334561.

165433091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 165433091 - 2¹⁰ = 165432067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165433591) 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, 1759880 + ... + 1759973.

It is an arithmetic number, because the mean of its divisors is an integer number (42238248).

Almost surely, 2^165433091 is an apocalyptic number.

165433091 is a deficient number, since it is larger than the sum of its proper divisors (3519901).

165433091 is an equidigital number, since it uses as much as digits as its factorization.

165433091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519900.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 165433091 is about 12862.0795752475. The cubic root of 165433091 is about 548.9601188898.

The spelling of 165433091 in words is "one hundred sixty-five million, four hundred thirty-three thousand, ninety-one".