164443109 has 2 divisors, whose sum is σ = 164443110. Its totient is φ = 164443108.

The previous prime is 164443073. The next prime is 164443151. The reversal of 164443109 is 901344461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142324900 + 22118209 = 11930^2 + 4703^2 .

It is an emirp because it is prime and its reverse (901344461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164443109 - 2¹² = 164439013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164440109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82221554 + 82221555.

It is an arithmetic number, because the mean of its divisors is an integer number (82221555).

Almost surely, 2^164443109 is an apocalyptic number.

It is an amenable number.

164443109 is a deficient number, since it is larger than the sum of its proper divisors (1).

164443109 is an equidigital number, since it uses as much as digits as its factorization.

164443109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 164443109 is about 12823.5373045038. The cubic root of 164443109 is about 547.8629012621.

The spelling of 164443109 in words is "one hundred sixty-four million, four hundred forty-three thousand, one hundred nine".