2100913 has 2 divisors, whose sum is σ = 2100914. Its totient is φ = 2100912.

The previous prime is 2100899. The next prime is 2100929. The reversal of 2100913 is 3190012.

It is an a-pointer prime, because the next prime (2100929) can be obtained adding 2100913 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1669264 + 431649 = 1292^2 + 657^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100913 - 2¹³ = 2092721 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050456 + 1050457.

It is an arithmetic number, because the mean of its divisors is an integer number (1050457).

2^2100913 is an apocalyptic number.

It is an amenable number.

2100913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100913 is an equidigital number, since it uses as much as digits as its factorization.

2100913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 2100913 is about 1449.4526553151. The cubic root of 2100913 is about 128.0764720445.

Adding to 2100913 its reverse (3190012), we get a palindrome (5290925).

The spelling of 2100913 in words is "two million, one hundred thousand, nine hundred thirteen".