2116901 has 2 divisors, whose sum is σ = 2116902. Its totient is φ = 2116900.

The previous prime is 2116867. The next prime is 2116903. The reversal of 2116901 is 1096112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1324801 + 792100 = 1151^2 + 890^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116901 - 2⁶ = 2116837 is a prime.

Together with 2116903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2116903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058450 + 1058451.

It is an arithmetic number, because the mean of its divisors is an integer number (1058451).

2^2116901 is an apocalyptic number.

It is an amenable number.

2116901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116901 is an equidigital number, since it uses as much as digits as its factorization.

2116901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 2116901 is about 1454.9573876922. The cubic root of 2116901 is about 128.4005397505.

The spelling of 2116901 in words is "two million, one hundred sixteen thousand, nine hundred one".