2001872017 has 2 divisors, whose sum is σ = 2001872018. Its totient is φ = 2001872016.

The previous prime is 2001872003. The next prime is 2001872021. The reversal of 2001872017 is 7102781002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2000236176 + 1635841 = 44724^2 + 1279^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001872017 - 2⁷ = 2001871889 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001872057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000936008 + 1000936009.

It is an arithmetic number, because the mean of its divisors is an integer number (1000936009).

Almost surely, 2^2001872017 is an apocalyptic number.

It is an amenable number.

2001872017 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001872017 is an equidigital number, since it uses as much as digits as its factorization.

2001872017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 2001872017 is about 44742.2844410073. The cubic root of 2001872017 is about 1260.3140262480.

The spelling of 2001872017 in words is "two billion, one million, eight hundred seventy-two thousand, seventeen".