2805995939 has 4 divisors (see below), whose sum is σ = 2811361656. Its totient is φ = 2800630224.

The previous prime is 2805995893. The next prime is 2805995963. The reversal of 2805995939 is 9395995082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9395995082 = 2 ⋅4697997541.

It is a cyclic number.

It is not a de Polignac number, because 2805995939 - 2¹² = 2805991843 is a prime.

It is a super-2 number, since 2×2805995939² = 15747226419368983442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2805995989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2682074 + ... + 2683119.

It is an arithmetic number, because the mean of its divisors is an integer number (702840414).

Almost surely, 2^2805995939 is an apocalyptic number.

2805995939 is a deficient number, since it is larger than the sum of its proper divisors (5365717).

2805995939 is an equidigital number, since it uses as much as digits as its factorization.

2805995939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5365716.

The product of its (nonzero) digits is 7873200, while the sum is 59.

The square root of 2805995939 is about 52971.6522207869. The cubic root of 2805995939 is about 1410.4651046822.

The spelling of 2805995939 in words is "two billion, eight hundred five million, nine hundred ninety-five thousand, nine hundred thirty-nine".