164542673 has 2 divisors, whose sum is σ = 164542674. Its totient is φ = 164542672.

The previous prime is 164542669. The next prime is 164542691. The reversal of 164542673 is 376245461.

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., 99062209 + 65480464 = 9953^2 + 8092^2 .

It is a cyclic number.

It is not a de Polignac number, because 164542673 - 2² = 164542669 is a prime.

It is not a weakly prime, because it can be changed into another prime (164542613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82271336 + 82271337.

It is an arithmetic number, because the mean of its divisors is an integer number (82271337).

Almost surely, 2^164542673 is an apocalyptic number.

It is an amenable number.

164542673 is a deficient number, since it is larger than the sum of its proper divisors (1).

164542673 is an equidigital number, since it uses as much as digits as its factorization.

164542673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 38.

The square root of 164542673 is about 12827.4187972483. The cubic root of 164542673 is about 547.9734489507.

The spelling of 164542673 in words is "one hundred sixty-four million, five hundred forty-two thousand, six hundred seventy-three".