189667 has 4 divisors (see below), whose sum is σ = 190696. Its totient is φ = 188640.

The previous prime is 189661. The next prime is 189671. The reversal of 189667 is 766981.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 766981 = 23 ⋅33347.

It is a cyclic number.

It is not a de Polignac number, because 189667 - 2¹⁵ = 156899 is a prime.

It is a Duffinian number.

189667 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (189661) 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, 153 + ... + 634.

It is an arithmetic number, because the mean of its divisors is an integer number (47674).

2¹⁸⁹⁶⁶⁷ is an apocalyptic number.

189667 is a deficient number, since it is larger than the sum of its proper divisors (1029).

189667 is an equidigital number, since it uses as much as digits as its factorization.

189667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its digits is 18144, while the sum is 37.

The square root of 189667 is about 435.5077496440. The cubic root of 189667 is about 57.4553654873.

The spelling of 189667 in words is "one hundred eighty-nine thousand, six hundred sixty-seven".