4000012000009 has 3 divisors (see below), whose sum is σ = 4000014000013. Its totient is φ = 4000010000006.

The previous prime is 4000012000007. The next prime is 4000012000031. The reversal of 4000012000009 is 9000002100004.

The square root of 4000012000009 is 2000003.

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

4000012000009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4000012000009 - 2¹ = 4000012000007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4000011999956 and 4000012000001.

It is not an unprimeable number, because it can be changed into a prime (4000012000001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1000002 + ... + 3000004.

Almost surely, 2^{4000012000009} is an apocalyptic number.

4000012000009 is the 2000003-rd square number.

4000012000009 is the 1000002-nd centered octagonal number.

It is an amenable number.

4000012000009 is a deficient number, since it is larger than the sum of its proper divisors (2000004).

4000012000009 is an frugal number, since it uses more digits than its factorization.

4000012000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000006 (or 2000003 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Multiplying 4000012000009 by its sum of digits (16), we get a square (64000192000144 = 8000012²).

The spelling of 4000012000009 in words is "four trillion, twelve million, nine", and thus it is an aban number.