164243423 has 2 divisors, whose sum is σ = 164243424. Its totient is φ = 164243422.

The previous prime is 164243411. The next prime is 164243459. The reversal of 164243423 is 324342461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164243423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164243323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82121711 + 82121712.

It is an arithmetic number, because the mean of its divisors is an integer number (82121712).

Almost surely, 2^164243423 is an apocalyptic number.

164243423 is a deficient number, since it is larger than the sum of its proper divisors (1).

164243423 is an equidigital number, since it uses as much as digits as its factorization.

164243423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 29.

The square root of 164243423 is about 12815.7490221992. The cubic root of 164243423 is about 547.6410517642.

Adding to 164243423 its reverse (324342461), we get a palindrome (488585884).

The spelling of 164243423 in words is "one hundred sixty-four million, two hundred forty-three thousand, four hundred twenty-three".