2001901013 has 4 divisors (see below), whose sum is σ = 2287886880. Its totient is φ = 1715915148.

The previous prime is 2001901007. The next prime is 2001901049. The reversal of 2001901013 is 3101091002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3101091002 = 2 ⋅1550545501.

It is a cyclic number.

It is not a de Polignac number, because 2001901013 - 2⁸ = 2001900757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001900982 and 2001901000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001901063) 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, 142992923 + ... + 142992936.

It is an arithmetic number, because the mean of its divisors is an integer number (571971720).

Almost surely, 2^2001901013 is an apocalyptic number.

It is an amenable number.

2001901013 is a deficient number, since it is larger than the sum of its proper divisors (285985867).

2001901013 is an equidigital number, since it uses as much as digits as its factorization.

2001901013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285985866.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 2001901013 is about 44742.6084733557. The cubic root of 2001901013 is about 1260.3201112006.

Adding to 2001901013 its reverse (3101091002), we get a palindrome (5102992015).

The spelling of 2001901013 in words is "two billion, one million, nine hundred one thousand, thirteen".