171982033 has 2 divisors, whose sum is σ = 171982034. Its totient is φ = 171982032.

The previous prime is 171982021. The next prime is 171982049. The reversal of 171982033 is 330289171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128527569 + 43454464 = 11337^2 + 6592^2 .

It is a cyclic number.

It is not a de Polignac number, because 171982033 - 2⁵ = 171982001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171982033.

It is not a weakly prime, because it can be changed into another prime (171982133) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85991016 + 85991017.

It is an arithmetic number, because the mean of its divisors is an integer number (85991017).

Almost surely, 2^171982033 is an apocalyptic number.

It is an amenable number.

171982033 is a deficient number, since it is larger than the sum of its proper divisors (1).

171982033 is an equidigital number, since it uses as much as digits as its factorization.

171982033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 171982033 is about 13114.1920452615. The cubic root of 171982033 is about 556.1104116683.

The spelling of 171982033 in words is "one hundred seventy-one million, nine hundred eighty-two thousand, thirty-three".