2164994609 has 2 divisors, whose sum is σ = 2164994610. Its totient is φ = 2164994608.

The previous prime is 2164994599. The next prime is 2164994617. The reversal of 2164994609 is 9064994612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1584040000 + 580954609 = 39800^2 + 24103^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164994609 - 2⁴ = 2164994593 is a prime.

It is not a weakly prime, because it can be changed into another prime (2164994009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082497304 + 1082497305.

It is an arithmetic number, because the mean of its divisors is an integer number (1082497305).

Almost surely, 2^2164994609 is an apocalyptic number.

It is an amenable number.

2164994609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164994609 is an equidigital number, since it uses as much as digits as its factorization.

2164994609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 2164994609 is about 46529.5025655766. The cubic root of 2164994609 is about 1293.6563950916.

The spelling of 2164994609 in words is "two billion, one hundred sixty-four million, nine hundred ninety-four thousand, six hundred nine".