171139223 has 2 divisors, whose sum is σ = 171139224. Its totient is φ = 171139222.

The previous prime is 171139217. The next prime is 171139253. The reversal of 171139223 is 322931171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171139223 - 2⁸ = 171138967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171139253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85569611 + 85569612.

It is an arithmetic number, because the mean of its divisors is an integer number (85569612).

Almost surely, 2^171139223 is an apocalyptic number.

171139223 is a deficient number, since it is larger than the sum of its proper divisors (1).

171139223 is an equidigital number, since it uses as much as digits as its factorization.

171139223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 29.

The square root of 171139223 is about 13082.0190719934. The cubic root of 171139223 is about 555.2005043483.

The spelling of 171139223 in words is "one hundred seventy-one million, one hundred thirty-nine thousand, two hundred twenty-three".