2000991217 has 2 divisors, whose sum is σ = 2000991218. Its totient is φ = 2000991216.

The previous prime is 2000991199. The next prime is 2000991221. The reversal of 2000991217 is 7121990002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1383170481 + 617820736 = 37191^2 + 24856^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000991217 - 2²³ = 1992602609 is a prime.

It is a super-2 number, since 2×2000991217² = 8007931701022282178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2000991257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000495608 + 1000495609.

It is an arithmetic number, because the mean of its divisors is an integer number (1000495609).

Almost surely, 2^2000991217 is an apocalyptic number.

It is an amenable number.

2000991217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000991217 is an equidigital number, since it uses as much as digits as its factorization.

2000991217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 2000991217 is about 44732.4403201972. The cubic root of 2000991217 is about 1260.1291580458.

The spelling of 2000991217 in words is "two billion, nine hundred ninety-one thousand, two hundred seventeen".