171439943 has 2 divisors, whose sum is σ = 171439944. Its totient is φ = 171439942.

The previous prime is 171439921. The next prime is 171439979. The reversal of 171439943 is 349934171.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171439943 - 2¹⁴ = 171423559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171439943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171439913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85719971 + 85719972.

It is an arithmetic number, because the mean of its divisors is an integer number (85719972).

Almost surely, 2^171439943 is an apocalyptic number.

171439943 is a deficient number, since it is larger than the sum of its proper divisors (1).

171439943 is an equidigital number, since it uses as much as digits as its factorization.

171439943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 171439943 is about 13093.5076660152. The cubic root of 171439943 is about 555.5255071852.

The spelling of 171439943 in words is "one hundred seventy-one million, four hundred thirty-nine thousand, nine hundred forty-three".