2005179161 has 4 divisors (see below), whose sum is σ = 2074323300. Its totient is φ = 1936035024.

The previous prime is 2005179131. The next prime is 2005179173. The reversal of 2005179161 is 1619715002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 910892761 + 1094286400 = 30181^2 + 33080^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005179161 - 2¹⁰ = 2005178137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2005179131) 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, 34572026 + ... + 34572083.

It is an arithmetic number, because the mean of its divisors is an integer number (518580825).

Almost surely, 2^2005179161 is an apocalyptic number.

It is an amenable number.

2005179161 is a deficient number, since it is larger than the sum of its proper divisors (69144139).

2005179161 is an equidigital number, since it uses as much as digits as its factorization.

2005179161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69144138.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 2005179161 is about 44779.2268914951. The cubic root of 2005179161 is about 1261.0076681329.

The spelling of 2005179161 in words is "two billion, five million, one hundred seventy-nine thousand, one hundred sixty-one".