2191337 has 2 divisors, whose sum is σ = 2191338. Its totient is φ = 2191336.

The previous prime is 2191331. The next prime is 2191339. The reversal of 2191337 is 7331912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142761 + 1048576 = 1069^2 + 1024^2 .

It is a cyclic number.

It is not a de Polignac number, because 2191337 - 2¹⁶ = 2125801 is a prime.

Together with 2191339, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2191331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095668 + 1095669.

It is an arithmetic number, because the mean of its divisors is an integer number (1095669).

2^2191337 is an apocalyptic number.

It is an amenable number.

2191337 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191337 is an equidigital number, since it uses as much as digits as its factorization.

2191337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 26.

The square root of 2191337 is about 1480.3165202078. The cubic root of 2191337 is about 129.8882076402. Note that the first 3 decimals are identical.

The spelling of 2191337 in words is "two million, one hundred ninety-one thousand, three hundred thirty-seven".