171679 has 2 divisors, whose sum is σ = 171680. Its totient is φ = 171678.

The previous prime is 171673. The next prime is 171697. The reversal of 171679 is 976171.

Together with next prime (171697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171679 - 2³ = 171671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85839 + 85840.

It is an arithmetic number, because the mean of its divisors is an integer number (85840).

2¹⁷¹⁶⁷⁹ is an apocalyptic number.

171679 is a deficient number, since it is larger than the sum of its proper divisors (1).

171679 is an equidigital number, since it uses as much as digits as its factorization.

171679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 31.

The square root of 171679 is about 414.3416464706. The cubic root of 171679 is about 55.5783596753.

The spelling of 171679 in words is "one hundred seventy-one thousand, six hundred seventy-nine".