2166629 has 2 divisors, whose sum is σ = 2166630. Its totient is φ = 2166628.

The previous prime is 2166613. The next prime is 2166673. The reversal of 2166629 is 9266612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1809025 + 357604 = 1345^2 + 598^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166629 - 2⁴ = 2166613 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166595 and 2166604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083314 + 1083315.

It is an arithmetic number, because the mean of its divisors is an integer number (1083315).

2^2166629 is an apocalyptic number.

It is an amenable number.

2166629 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166629 is an equidigital number, since it uses as much as digits as its factorization.

2166629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 2166629 is about 1471.9473496019. The cubic root of 2166629 is about 129.3981847564.

The spelling of 2166629 in words is "two million, one hundred sixty-six thousand, six hundred twenty-nine".