170977 has 4 divisors (see below), whose sum is σ = 175636. Its totient is φ = 166320.

The previous prime is 170971. The next prime is 171007. The reversal of 170977 is 779071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 779071 = 353 ⋅2207.

It can be written as a sum of positive squares in 2 ways, for example, as 112896 + 58081 = 336^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 170977 - 2¹⁵ = 138209 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2274 + ... + 2347.

It is an arithmetic number, because the mean of its divisors is an integer number (43909).

2¹⁷⁰⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

170977 is a deficient number, since it is larger than the sum of its proper divisors (4659).

170977 is an equidigital number, since it uses as much as digits as its factorization.

170977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658.

The product of its (nonzero) digits is 3087, while the sum is 31.

The square root of 170977 is about 413.4936517046. The cubic root of 170977 is about 55.5025023897.

The spelling of 170977 in words is "one hundred seventy thousand, nine hundred seventy-seven".