171982133 has 2 divisors, whose sum is σ = 171982134. Its totient is φ = 171982132.

The previous prime is 171982127. The next prime is 171982147. The reversal of 171982133 is 331289171.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138133009 + 33849124 = 11753^2 + 5818^2 .

It is a cyclic number.

It is not a de Polignac number, because 171982133 - 2²⁶ = 104873269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 171982093 and 171982102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171982103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85991066 + 85991067.

It is an arithmetic number, because the mean of its divisors is an integer number (85991067).

Almost surely, 2^171982133 is an apocalyptic number.

It is an amenable number.

171982133 is a deficient number, since it is larger than the sum of its proper divisors (1).

171982133 is an equidigital number, since it uses as much as digits as its factorization.

171982133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 171982133 is about 13114.1958579243. The cubic root of 171982133 is about 556.1105194529.

The spelling of 171982133 in words is "one hundred seventy-one million, nine hundred eighty-two thousand, one hundred thirty-three".