170979 has 4 divisors (see below), whose sum is σ = 227976. Its totient is φ = 113984.

The previous prime is 170971. The next prime is 171007. The reversal of 170979 is 979071.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 170979 - 2³ = 170971 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (170971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28494 + ... + 28499.

It is an arithmetic number, because the mean of its divisors is an integer number (56994).

2¹⁷⁰⁹⁷⁹ is an apocalyptic number.

170979 is a deficient number, since it is larger than the sum of its proper divisors (56997).

170979 is an equidigital number, since it uses as much as digits as its factorization.

170979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56996.

The product of its (nonzero) digits is 3969, while the sum is 33.

The square root of 170979 is about 413.4960701143. The cubic root of 170979 is about 55.5027188020.

The spelling of 170979 in words is "one hundred seventy thousand, nine hundred seventy-nine".