2075804721 has 9 divisors (see below), whose sum is σ = 2998582041. Its totient is φ = 1383778692.

The previous prime is 2075804699. The next prime is 2075804741. The reversal of 2075804721 is 1274085702.

The square root of 2075804721 is 45561.

It is a perfect power (a square), and thus also a powerful number.

2075804721 is a `hidden beast` number, since 2 + 0 + 7 + 580 + 4 + 72 + 1 = 666.

2075804721 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2075804721 - 2²⁵ = 2042250289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2075804741) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 129090 + ... + 144276.

Almost surely, 2^2075804721 is an apocalyptic number.

2075804721 is the 45561-st square number.

2075804721 is the 22781-st centered octagonal number.

It is an amenable number.

2075804721 is a deficient number, since it is larger than the sum of its proper divisors (922777320).

2075804721 is an frugal number, since it uses more digits than its factorization.

2075804721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30380 (or 15190 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The cubic root of 2075804721 is about 1275.6420646194.

Multiplying 2075804721 by its sum of digits (36), we get a square (74728969956 = 273366²).

The spelling of 2075804721 in words is "two billion, seventy-five million, eight hundred four thousand, seven hundred twenty-one".