171000649 has 2 divisors, whose sum is σ = 171000650. Its totient is φ = 171000648.

The previous prime is 171000623. The next prime is 171000673. The reversal of 171000649 is 946000171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166590649 + 4410000 = 12907^2 + 2100^2 .

It is an emirp because it is prime and its reverse (946000171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171000649 - 2⁷ = 171000521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (171000679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85500324 + 85500325.

It is an arithmetic number, because the mean of its divisors is an integer number (85500325).

Almost surely, 2^171000649 is an apocalyptic number.

It is an amenable number.

171000649 is a deficient number, since it is larger than the sum of its proper divisors (1).

171000649 is an equidigital number, since it uses as much as digits as its factorization.

171000649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 171000649 is about 13076.7216457337. The cubic root of 171000649 is about 555.0506124879.

The spelling of 171000649 in words is "one hundred seventy-one million, six hundred forty-nine", and thus it is an aban number.