2001319445 has 4 divisors (see below), whose sum is σ = 2401583340. Its totient is φ = 1601055552.

The previous prime is 2001319433. The next prime is 2001319487. The reversal of 2001319445 is 5449131002.

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 1055080324 + 946239121 = 32482^2 + 30761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001319445 - 2²⁸ = 1732883989 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 200131940 + ... + 200131949.

It is an arithmetic number, because the mean of its divisors is an integer number (600395835).

Almost surely, 2^2001319445 is an apocalyptic number.

It is an amenable number.

2001319445 is a deficient number, since it is larger than the sum of its proper divisors (400263895).

2001319445 is an equidigital number, since it uses as much as digits as its factorization.

2001319445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400263894.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2001319445 is about 44736.1089613301. The cubic root of 2001319445 is about 1260.1980550766.

The spelling of 2001319445 in words is "two billion, one million, three hundred nineteen thousand, four hundred forty-five".