2039855173 has 4 divisors (see below), whose sum is σ = 2042536428. Its totient is φ = 2037173920.

The previous prime is 2039855161. The next prime is 2039855179. The reversal of 2039855173 is 3715589302.

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 29408929 + 2010446244 = 5423^2 + 44838^2 .

It is a cyclic number.

It is not a de Polignac number, because 2039855173 - 2²⁹ = 1502984261 is a prime.

It is a super-2 number, since 2×2039855173² = 8322018253629719858, 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 (2039855179) 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, 1339486 + ... + 1341007.

It is an arithmetic number, because the mean of its divisors is an integer number (510634107).

Almost surely, 2^2039855173 is an apocalyptic number.

It is an amenable number.

2039855173 is a deficient number, since it is larger than the sum of its proper divisors (2681255).

2039855173 is an equidigital number, since it uses as much as digits as its factorization.

2039855173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681254.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 2039855173 is about 45164.7558722507. The cubic root of 2039855173 is about 1268.2351274524.

The spelling of 2039855173 in words is "two billion, thirty-nine million, eight hundred fifty-five thousand, one hundred seventy-three".