2118667 has 2 divisors, whose sum is σ = 2118668. Its totient is φ = 2118666.

The previous prime is 2118661. The next prime is 2118689. The reversal of 2118667 is 7668112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2118667 - 2¹⁵ = 2085899 is a prime.

It is not a weakly prime, because it can be changed into another prime (2118661) 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, 1059333 + 1059334.

It is an arithmetic number, because the mean of its divisors is an integer number (1059334).

2^2118667 is an apocalyptic number.

2118667 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118667 is an equidigital number, since it uses as much as digits as its factorization.

2118667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 2118667 is about 1455.5641517982. The cubic root of 2118667 is about 128.4362353777.

The spelling of 2118667 in words is "two million, one hundred eighteen thousand, six hundred sixty-seven".