164144909 has 2 divisors, whose sum is σ = 164144910. Its totient is φ = 164144908.

The previous prime is 164144887. The next prime is 164144917. The reversal of 164144909 is 909441461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131905225 + 32239684 = 11485^2 + 5678^2 .

It is a cyclic number.

It is not a de Polignac number, because 164144909 - 2⁸ = 164144653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164144989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82072454 + 82072455.

It is an arithmetic number, because the mean of its divisors is an integer number (82072455).

Almost surely, 2^164144909 is an apocalyptic number.

It is an amenable number.

164144909 is a deficient number, since it is larger than the sum of its proper divisors (1).

164144909 is an equidigital number, since it uses as much as digits as its factorization.

164144909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 164144909 is about 12811.9049715489. The cubic root of 164144909 is about 547.5315372811.

The spelling of 164144909 in words is "one hundred sixty-four million, one hundred forty-four thousand, nine hundred nine".