164503189 has 2 divisors, whose sum is σ = 164503190. Its totient is φ = 164503188.

The previous prime is 164503123. The next prime is 164503211. The reversal of 164503189 is 981305461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159516900 + 4986289 = 12630^2 + 2233^2 .

It is an emirp because it is prime and its reverse (981305461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164503189 - 2⁹ = 164502677 is a prime.

It is a super-2 number, since 2×164503189² = 54122598382339442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164503589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82251594 + 82251595.

It is an arithmetic number, because the mean of its divisors is an integer number (82251595).

Almost surely, 2^164503189 is an apocalyptic number.

It is an amenable number.

164503189 is a deficient number, since it is larger than the sum of its proper divisors (1).

164503189 is an equidigital number, since it uses as much as digits as its factorization.

164503189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 164503189 is about 12825.8796579416. The cubic root of 164503189 is about 547.9296144971.

The spelling of 164503189 in words is "one hundred sixty-four million, five hundred three thousand, one hundred eighty-nine".