9000001 has 4 divisors (see below), whose sum is σ = 9147604. Its totient is φ = 8852400.

The previous prime is 8999993. The next prime is 9000011. The reversal of 9000001 is 1000009.

It is a happy number.

9000001 is digitally balanced in base 3, 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 3000²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1000009 = 293 ⋅3413.

It can be written as a sum of positive squares in 2 ways, for example, as 291600 + 8708401 = 540^2 + 2951^2 .

It is a cyclic number.

It is not a de Polignac number, because 9000001 - 2³ = 8999993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9000011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73710 + ... + 73831.

It is an arithmetic number, because the mean of its divisors is an integer number (2286901).

Almost surely, 2^9000001 is an apocalyptic number.

It is an amenable number.

9000001 is a deficient number, since it is larger than the sum of its proper divisors (147603).

9000001 is a wasteful number, since it uses less digits than its factorization.

9000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147602.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 9000001 is about 3000.0001666667. Note that the first 3 decimals coincide. The cubic root of 9000001 is about 208.0083900092.

The spelling of 9000001 in words is "nine million, one", and thus it is an aban number and an uban number.