67989 has 8 divisors (see below), whose sum is σ = 91872. Its totient is φ = 44720.

The previous prime is 67987. The next prime is 67993. The reversal of 67989 is 98976.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67989 - 2¹ = 67987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67987) 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 7 ways as a sum of consecutive naturals, for example, 307 + ... + 479.

It is an arithmetic number, because the mean of its divisors is an integer number (11484).

2⁶⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

67989 is a deficient number, since it is larger than the sum of its proper divisors (23883).

67989 is a wasteful number, since it uses less digits than its factorization.

67989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307.

The product of its digits is 27216, while the sum is 39.

The square root of 67989 is about 260.7470038179. The cubic root of 67989 is about 40.8143500080.

The spelling of 67989 in words is "sixty-seven thousand, nine hundred eighty-nine".