2000001901 has 4 divisors (see below), whose sum is σ = 2000484892. Its totient is φ = 1999518912.

The previous prime is 2000001881. The next prime is 2000001929. The reversal of 2000001901 is 1091000002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1814334025 + 185667876 = 42595^2 + 13626^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000001901 - 2¹¹ = 1999999853 is a prime.

It is a super-2 number, since 2×2000001901² = 8000015208007227602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000001001) 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, 235230 + ... + 243583.

It is an arithmetic number, because the mean of its divisors is an integer number (500121223).

Almost surely, 2^2000001901 is an apocalyptic number.

It is an amenable number.

2000001901 is a deficient number, since it is larger than the sum of its proper divisors (482991).

2000001901 is an equidigital number, since it uses as much as digits as its factorization.

2000001901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482990.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 2000001901 is about 44721.3808038169. The cubic root of 2000001901 is about 1259.9214490797.

Adding to 2000001901 its reverse (1091000002), we get a palindrome (3091001903).

The spelling of 2000001901 in words is "two billion, one thousand, nine hundred one".