2091913 has 2 divisors, whose sum is σ = 2091914. Its totient is φ = 2091912.

The previous prime is 2091889. The next prime is 2091917. The reversal of 2091913 is 3191902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1763584 + 328329 = 1328^2 + 573^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091913 - 2¹³ = 2083721 is a prime.

It is not a weakly prime, because it can be changed into another prime (2091917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045956 + 1045957.

It is an arithmetic number, because the mean of its divisors is an integer number (1045957).

2^2091913 is an apocalyptic number.

It is an amenable number.

2091913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091913 is an equidigital number, since it uses as much as digits as its factorization.

2091913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 2091913 is about 1446.3447030359. The cubic root of 2091913 is about 127.8933233914.

The spelling of 2091913 in words is "two million, ninety-one thousand, nine hundred thirteen".