164218529 has 2 divisors, whose sum is σ = 164218530. Its totient is φ = 164218528.

The previous prime is 164218513. The next prime is 164218547. The reversal of 164218529 is 925812461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161163025 + 3055504 = 12695^2 + 1748^2 .

It is a cyclic number.

It is not a de Polignac number, because 164218529 - 2⁴ = 164218513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 164218492 and 164218501.

It is not a weakly prime, because it can be changed into another prime (164218559) 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, 82109264 + 82109265.

It is an arithmetic number, because the mean of its divisors is an integer number (82109265).

Almost surely, 2^164218529 is an apocalyptic number.

It is an amenable number.

164218529 is a deficient number, since it is larger than the sum of its proper divisors (1).

164218529 is an equidigital number, since it uses as much as digits as its factorization.

164218529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 164218529 is about 12814.7777585099. Note that the first 4 decimals coincide. The cubic root of 164218529 is about 547.6133821323.

The spelling of 164218529 in words is "one hundred sixty-four million, two hundred eighteen thousand, five hundred twenty-nine".