171923 has 2 divisors, whose sum is σ = 171924. Its totient is φ = 171922.

The previous prime is 171917. The next prime is 171929. The reversal of 171923 is 329171.

It is a balanced prime because it is at equal distance from previous prime (171917) and next prime (171929).

It is a cyclic number.

It is not a de Polignac number, because 171923 - 2¹⁰ = 170899 is a prime.

It is not a weakly prime, because it can be changed into another prime (171929) 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, 85961 + 85962.

It is an arithmetic number, because the mean of its divisors is an integer number (85962).

2¹⁷¹⁹²³ is an apocalyptic number.

171923 is a deficient number, since it is larger than the sum of its proper divisors (1).

171923 is an equidigital number, since it uses as much as digits as its factorization.

171923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 23.

The square root of 171923 is about 414.6359849314. The cubic root of 171923 is about 55.6046775907.

The spelling of 171923 in words is "one hundred seventy-one thousand, nine hundred twenty-three".