2809000001 has 8 divisors (see below), whose sum is σ = 2925369000. Its totient is φ = 2693931520.

The previous prime is 2808999967. The next prime is 2809000037. The reversal of 2809000001 is 1000009082.

2809000001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 53000²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 329059600 + 2479940401 = 18140^2 + 49799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2809000001 - 2⁶ = 2808999937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2809000081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320720 + ... + 329361.

It is an arithmetic number, because the mean of its divisors is an integer number (365671125).

Almost surely, 2^2809000001 is an apocalyptic number.

It is an amenable number.

2809000001 is a deficient number, since it is larger than the sum of its proper divisors (116368999).

2809000001 is a wasteful number, since it uses less digits than its factorization.

2809000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650259.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2809000001 is about 53000.0000094340. Note that the first 5 decimals coincide. The cubic root of 2809000001 is about 1410.9682669039.

Adding to 2809000001 its reverse (1000009082), we get a palindrome (3809009083).

The spelling of 2809000001 in words is "two billion, eight hundred nine million, one", and thus it is an aban number.