164843281 has 2 divisors, whose sum is σ = 164843282. Its totient is φ = 164843280.

The previous prime is 164843267. The next prime is 164843291. The reversal of 164843281 is 182348461.

164843281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158986881 + 5856400 = 12609^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 164843281 - 2¹⁷ = 164712209 is a prime.

It is a super-2 number, since 2×164843281² = 54346614581689922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164843281.

It is not a weakly prime, because it can be changed into another prime (164843201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82421640 + 82421641.

It is an arithmetic number, because the mean of its divisors is an integer number (82421641).

Almost surely, 2^164843281 is an apocalyptic number.

It is an amenable number.

164843281 is a deficient number, since it is larger than the sum of its proper divisors (1).

164843281 is an equidigital number, since it uses as much as digits as its factorization.

164843281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 37.

The square root of 164843281 is about 12839.1308506456. The cubic root of 164843281 is about 548.3069490440.

The spelling of 164843281 in words is "one hundred sixty-four million, eight hundred forty-three thousand, two hundred eighty-one".