171323947 has 2 divisors, whose sum is σ = 171323948. Its totient is φ = 171323946.

The previous prime is 171323927. The next prime is 171323951. The reversal of 171323947 is 749323171.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 171323947 - 2⁷ = 171323819 is a prime.

It is not a weakly prime, because it can be changed into another prime (171323927) 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, 85661973 + 85661974.

It is an arithmetic number, because the mean of its divisors is an integer number (85661974).

Almost surely, 2^171323947 is an apocalyptic number.

171323947 is a deficient number, since it is larger than the sum of its proper divisors (1).

171323947 is an equidigital number, since it uses as much as digits as its factorization.

171323947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 171323947 is about 13089.0773930022. The cubic root of 171323947 is about 555.4001896850.

The spelling of 171323947 in words is "one hundred seventy-one million, three hundred twenty-three thousand, nine hundred forty-seven".