171439 has 2 divisors, whose sum is σ = 171440. Its totient is φ = 171438.

The previous prime is 171427. The next prime is 171449. The reversal of 171439 is 934171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 171439 - 2⁹ = 170927 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85719 + 85720.

It is an arithmetic number, because the mean of its divisors is an integer number (85720).

2¹⁷¹⁴³⁹ is an apocalyptic number.

171439 is a deficient number, since it is larger than the sum of its proper divisors (1).

171439 is an equidigital number, since it uses as much as digits as its factorization.

171439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 171439 is about 414.0519291103. The cubic root of 171439 is about 55.5524488633.

The spelling of 171439 in words is "one hundred seventy-one thousand, four hundred thirty-nine".