2001002000873 has 2 divisors, whose sum is σ = 2001002000874. Its totient is φ = 2001002000872.

The previous prime is 2001002000869. The next prime is 2001002000897. The reversal of 2001002000873 is 3780002001002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1449262045609 + 551739955264 = 1203853^2 + 742792^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001002000873 - 2² = 2001002000869 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001002000843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000501000436 + 1000501000437.

It is an arithmetic number, because the mean of its divisors is an integer number (1000501000437).

Almost surely, 2^{2001002000873} is an apocalyptic number.

It is an amenable number.

2001002000873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001002000873 is an equidigital number, since it uses as much as digits as its factorization.

2001002000873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 2001002000873 its reverse (3780002001002), we get a palindrome (5781004001875).

The spelling of 2001002000873 in words is "two trillion, one billion, two million, eight hundred seventy-three", and thus it is an aban number.