167989 has 4 divisors (see below), whose sum is σ = 173440. Its totient is φ = 162540.

The previous prime is 167987. The next prime is 168013. The reversal of 167989 is 989761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 167989 - 2¹ = 167987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2679 + ... + 2740.

It is an arithmetic number, because the mean of its divisors is an integer number (43360).

2¹⁶⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

167989 is a deficient number, since it is larger than the sum of its proper divisors (5451).

167989 is an equidigital number, since it uses as much as digits as its factorization.

167989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5450.

The product of its digits is 27216, while the sum is 40.

The square root of 167989 is about 409.8646117927. The cubic root of 167989 is about 55.1772792090.

It can be divided in two parts, 16798 and 9, that added together give a 5-th power (16807 = 7⁵).

The spelling of 167989 in words is "one hundred sixty-seven thousand, nine hundred eighty-nine".