2100000997 has 2 divisors, whose sum is σ = 2100000998. Its totient is φ = 2100000996.

The previous prime is 2100000961. The next prime is 2100001021. The reversal of 2100000997 is 7990000012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1443924001 + 656076996 = 37999^2 + 25614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100000997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100000907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050000498 + 1050000499.

It is an arithmetic number, because the mean of its divisors is an integer number (1050000499).

Almost surely, 2^2100000997 is an apocalyptic number.

It is an amenable number.

2100000997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100000997 is an equidigital number, since it uses as much as digits as its factorization.

2100000997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 2100000997 is about 45825.7678277189. The cubic root of 2100000997 is about 1280.5793676442.

The spelling of 2100000997 in words is "two billion, one hundred million, nine hundred ninety-seven", and thus it is an aban number.