2108997601 has 2 divisors, whose sum is σ = 2108997602. Its totient is φ = 2108997600.

The previous prime is 2108997599. The next prime is 2108997607. The reversal of 2108997601 is 1067998012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1570061376 + 538936225 = 39624^2 + 23215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2108997601 - 2¹ = 2108997599 is a prime.

Together with 2108997599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2108997607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054498800 + 1054498801.

It is an arithmetic number, because the mean of its divisors is an integer number (1054498801).

Almost surely, 2^2108997601 is an apocalyptic number.

It is an amenable number.

2108997601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2108997601 is an equidigital number, since it uses as much as digits as its factorization.

2108997601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 2108997601 is about 45923.8238934869. The cubic root of 2108997601 is about 1282.4054703242.

The spelling of 2108997601 in words is "two billion, one hundred eight million, nine hundred ninety-seven thousand, six hundred one".