164549617 has 2 divisors, whose sum is σ = 164549618. Its totient is φ = 164549616.

The previous prime is 164549611. The next prime is 164549657. The reversal of 164549617 is 716945461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92910321 + 71639296 = 9639^2 + 8464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164549617 is a prime.

It is not a weakly prime, because it can be changed into another prime (164549611) 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, 82274808 + 82274809.

It is an arithmetic number, because the mean of its divisors is an integer number (82274809).

Almost surely, 2^164549617 is an apocalyptic number.

It is an amenable number.

164549617 is a deficient number, since it is larger than the sum of its proper divisors (1).

164549617 is an equidigital number, since it uses as much as digits as its factorization.

164549617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 164549617 is about 12827.6894645918. The cubic root of 164549617 is about 547.9811573342.

The spelling of 164549617 in words is "one hundred sixty-four million, five hundred forty-nine thousand, six hundred seventeen".