2002000001 has 4 divisors (see below), whose sum is σ = 2012373252. Its totient is φ = 1991626752.

The previous prime is 2001999997. The next prime is 2002000027. The reversal of 2002000001 is 1000002002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1000002002 = 2 ⋅500001001.

It can be written as a sum of positive squares in 2 ways, for example, as 242113600 + 1759886401 = 15560^2 + 41951^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002000001 - 2² = 2001999997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2002000031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5186336 + ... + 5186721.

It is an arithmetic number, because the mean of its divisors is an integer number (503093313).

Almost surely, 2^2002000001 is an apocalyptic number.

It is an amenable number.

2002000001 is a deficient number, since it is larger than the sum of its proper divisors (10373251).

2002000001 is a wasteful number, since it uses less digits than its factorization.

2002000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10373250.

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 2002000001 is about 44743.7146535689. The cubic root of 2002000001 is about 1260.3408838745.

Adding to 2002000001 its reverse (1000002002), we get a palindrome (3002002003).

The spelling of 2002000001 in words is "two billion, two million, one", and thus it is an aban number and an uban number.