201000009 has 24 divisors (see below), whose sum is σ = 317649600. Its totient is φ = 112685664.

The previous prime is 200999983. The next prime is 201000049. The reversal of 201000009 is 900000102.

It is a happy number.

201000009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201000009 - 2⁷ = 200999881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200999958 and 201000003.

It is not an unprimeable number, because it can be changed into a prime (201000049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5109 + ... + 20690.

It is an arithmetic number, because the mean of its divisors is an integer number (13235400).

Almost surely, 2^201000009 is an apocalyptic number.

It is an amenable number.

201000009 is a deficient number, since it is larger than the sum of its proper divisors (116649591).

201000009 is a wasteful number, since it uses less digits than its factorization.

201000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25869 (or 25862 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 201000009 is about 14177.4471961633. The cubic root of 201000009 is about 585.7766090080.

The spelling of 201000009 in words is "two hundred one million, nine", and thus it is an aban number.