164861443 has 2 divisors, whose sum is σ = 164861444. Its totient is φ = 164861442.

The previous prime is 164861357. The next prime is 164861449. The reversal of 164861443 is 344168461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164861443 is a prime.

It is not a weakly prime, because it can be changed into another prime (164861449) 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, 82430721 + 82430722.

It is an arithmetic number, because the mean of its divisors is an integer number (82430722).

Almost surely, 2^164861443 is an apocalyptic number.

164861443 is a deficient number, since it is larger than the sum of its proper divisors (1).

164861443 is an equidigital number, since it uses as much as digits as its factorization.

164861443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 164861443 is about 12839.8381220325. The cubic root of 164861443 is about 548.3270853113.

The spelling of 164861443 in words is "one hundred sixty-four million, eight hundred sixty-one thousand, four hundred forty-three".