2001310999 has 4 divisors (see below), whose sum is σ = 2002043880. Its totient is φ = 2000578120.

The previous prime is 2001310981. The next prime is 2001311017. The reversal of 2001310999 is 9990131002.

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

It is an interprime number because it is at equal distance from previous prime (2001310981) and next prime (2001311017).

It is a cyclic number.

It is not a de Polignac number, because 2001310999 - 2¹¹ = 2001308951 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 (2001310979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362329 + ... + 367810.

It is an arithmetic number, because the mean of its divisors is an integer number (500510970).

Almost surely, 2^2001310999 is an apocalyptic number.

2001310999 is a deficient number, since it is larger than the sum of its proper divisors (732881).

2001310999 is an equidigital number, since it uses as much as digits as its factorization.

2001310999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732880.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 2001310999 is about 44736.0145632129. The cubic root of 2001310999 is about 1260.1962823048.

The spelling of 2001310999 in words is "two billion, one million, three hundred ten thousand, nine hundred ninety-nine".