2166937 has 2 divisors, whose sum is σ = 2166938. Its totient is φ = 2166936.

The previous prime is 2166919. The next prime is 2166943. The reversal of 2166937 is 7396612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1879641 + 287296 = 1371^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166937 - 2¹⁹ = 1642649 is a prime.

2166937 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2166917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083468 + 1083469.

It is an arithmetic number, because the mean of its divisors is an integer number (1083469).

2^2166937 is an apocalyptic number.

It is an amenable number.

2166937 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166937 is an equidigital number, since it uses as much as digits as its factorization.

2166937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 2166937 is about 1472.0519691913. The cubic root of 2166937 is about 129.4043160556.

The spelling of 2166937 in words is "two million, one hundred sixty-six thousand, nine hundred thirty-seven".