171742943 has 2 divisors, whose sum is σ = 171742944. Its totient is φ = 171742942.

The previous prime is 171742933. The next prime is 171742981. The reversal of 171742943 is 349247171.

It is a happy number.

It is an a-pointer prime, because the next prime (171742981) can be obtained adding 171742943 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171742943 - 2⁴ = 171742927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 171742897 and 171742906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171742933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85871471 + 85871472.

It is an arithmetic number, because the mean of its divisors is an integer number (85871472).

Almost surely, 2^171742943 is an apocalyptic number.

171742943 is a deficient number, since it is larger than the sum of its proper divisors (1).

171742943 is an equidigital number, since it uses as much as digits as its factorization.

171742943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 171742943 is about 13105.0731779720. The cubic root of 171742943 is about 555.8525899691.

The spelling of 171742943 in words is "one hundred seventy-one million, seven hundred forty-two thousand, nine hundred forty-three".