165104791 has 4 divisors (see below), whose sum is σ = 170430784. Its totient is φ = 159778800.

The previous prime is 165104713. The next prime is 165104803. The reversal of 165104791 is 197401561.

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 165104791 - 2¹⁷ = 164973719 is a prime.

It is a super-2 number, since 2×165104791² = 54519184022307362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165174791) 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, 2662950 + ... + 2663011.

It is an arithmetic number, because the mean of its divisors is an integer number (42607696).

Almost surely, 2^165104791 is an apocalyptic number.

165104791 is a deficient number, since it is larger than the sum of its proper divisors (5325993).

165104791 is an equidigital number, since it uses as much as digits as its factorization.

165104791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325992.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 165104791 is about 12849.3109153760. The cubic root of 165104791 is about 548.5967434717.

The spelling of 165104791 in words is "one hundred sixty-five million, one hundred four thousand, seven hundred ninety-one".