189967 has 2 divisors, whose sum is σ = 189968. Its totient is φ = 189966.

The previous prime is 189961. The next prime is 189977. The reversal of 189967 is 769981.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189967 is a prime.

It is a super-2 number, since 2×189967² = 72174922178, which contains 22 as substring.

189967 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94983 + 94984.

It is an arithmetic number, because the mean of its divisors is an integer number (94984).

2¹⁸⁹⁹⁶⁷ is an apocalyptic number.

189967 is a deficient number, since it is larger than the sum of its proper divisors (1).

189967 is an equidigital number, since it uses as much as digits as its factorization.

189967 is an evil number, because the sum of its binary digits is even.

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

The square root of 189967 is about 435.8520391142. The cubic root of 189967 is about 57.4856422879.

It can be divided in two parts, 189 and 967, that added together give a square (1156 = 34²).

The spelling of 189967 in words is "one hundred eighty-nine thousand, nine hundred sixty-seven".