164220673 has 2 divisors, whose sum is σ = 164220674. Its totient is φ = 164220672.

The previous prime is 164220643. The next prime is 164220677. The reversal of 164220673 is 376022461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102880449 + 61340224 = 10143^2 + 7832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164220673 is a prime.

It is not a weakly prime, because it can be changed into another prime (164220677) 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, 82110336 + 82110337.

It is an arithmetic number, because the mean of its divisors is an integer number (82110337).

Almost surely, 2^164220673 is an apocalyptic number.

It is an amenable number.

164220673 is a deficient number, since it is larger than the sum of its proper divisors (1).

164220673 is an equidigital number, since it uses as much as digits as its factorization.

164220673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 164220673 is about 12814.8614116580. The cubic root of 164220673 is about 547.6157652941.

The spelling of 164220673 in words is "one hundred sixty-four million, two hundred twenty thousand, six hundred seventy-three".