178979 has 4 divisors (see below), whose sum is σ = 181080. Its totient is φ = 176880.

The previous prime is 178973. The next prime is 178987. The reversal of 178979 is 979871.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-178979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (178973) 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, 917 + ... + 1094.

It is an arithmetic number, because the mean of its divisors is an integer number (45270).

2¹⁷⁸⁹⁷⁹ is an apocalyptic number.

178979 is a deficient number, since it is larger than the sum of its proper divisors (2101).

178979 is an equidigital number, since it uses as much as digits as its factorization.

178979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100.

The product of its digits is 31752, while the sum is 41.

The square root of 178979 is about 423.0590975266. The cubic root of 178979 is about 56.3552039383.

The spelling of 178979 in words is "one hundred seventy-eight thousand, nine hundred seventy-nine".