2001011447 has 2 divisors, whose sum is σ = 2001011448. Its totient is φ = 2001011446.

The previous prime is 2001011399. The next prime is 2001011479. The reversal of 2001011447 is 7441101002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001011447 is a prime.

It is a super-2 number, since 2×2001011447² = 8008093622050067618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001013447) 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 as a sum of consecutive naturals, namely, 1000505723 + 1000505724.

It is an arithmetic number, because the mean of its divisors is an integer number (1000505724).

Almost surely, 2^2001011447 is an apocalyptic number.

2001011447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001011447 is an equidigital number, since it uses as much as digits as its factorization.

2001011447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 2001011447 is about 44732.6664418744. Note that the first 3 decimals coincide. The cubic root of 2001011447 is about 1260.1334046623.

Adding to 2001011447 its reverse (7441101002), we get a palindrome (9442112449).

The spelling of 2001011447 in words is "two billion, one million, eleven thousand, four hundred forty-seven".