2001117973 has 2 divisors, whose sum is σ = 2001117974. Its totient is φ = 2001117972.

The previous prime is 2001117971. The next prime is 2001118033. The reversal of 2001117973 is 3797111002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1114090884 + 887027089 = 33378^2 + 29783^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001117973 - 2¹ = 2001117971 is a prime.

Together with 2001117971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001117971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000558986 + 1000558987.

It is an arithmetic number, because the mean of its divisors is an integer number (1000558987).

Almost surely, 2^2001117973 is an apocalyptic number.

It is an amenable number.

2001117973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001117973 is an equidigital number, since it uses as much as digits as its factorization.

2001117973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 2001117973 is about 44733.8571218713. The cubic root of 2001117973 is about 1260.1557657853.

Adding to 2001117973 its reverse (3797111002), we get a palindrome (5798228975).

The spelling of 2001117973 in words is "two billion, one million, one hundred seventeen thousand, nine hundred seventy-three".