2164787 has 2 divisors, whose sum is σ = 2164788. Its totient is φ = 2164786.

The previous prime is 2164739. The next prime is 2164801. The reversal of 2164787 is 7874612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2164787 - 2¹⁴ = 2148403 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 6² + 4⁸ + 7 + 8⁷ + 7 .

It is not a weakly prime, because it can be changed into another prime (2164387) 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, 1082393 + 1082394.

It is an arithmetic number, because the mean of its divisors is an integer number (1082394).

2^2164787 is an apocalyptic number.

2164787 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164787 is an equidigital number, since it uses as much as digits as its factorization.

2164787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 35.

The square root of 2164787 is about 1471.3215148294. The cubic root of 2164787 is about 129.3615042672.

The spelling of 2164787 in words is "two million, one hundred sixty-four thousand, seven hundred eighty-seven".