164449171 has 2 divisors, whose sum is σ = 164449172. Its totient is φ = 164449170.

The previous prime is 164449163. The next prime is 164449189. The reversal of 164449171 is 171944461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164449171 - 2³ = 164449163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164449171.

It is not a weakly prime, because it can be changed into another prime (164449151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82224585 + 82224586.

It is an arithmetic number, because the mean of its divisors is an integer number (82224586).

Almost surely, 2^164449171 is an apocalyptic number.

164449171 is a deficient number, since it is larger than the sum of its proper divisors (1).

164449171 is an equidigital number, since it uses as much as digits as its factorization.

164449171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 164449171 is about 12823.7736645654. The cubic root of 164449171 is about 547.8696332845.

The spelling of 164449171 in words is "one hundred sixty-four million, four hundred forty-nine thousand, one hundred seventy-one".