189847 has 8 divisors (see below), whose sum is σ = 223136. Its totient is φ = 158112.

The previous prime is 189823. The next prime is 189851. The reversal of 189847 is 748981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189847 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108 + ... + 625.

It is an arithmetic number, because the mean of its divisors is an integer number (27892).

2¹⁸⁹⁸⁴⁷ is an apocalyptic number.

189847 is a deficient number, since it is larger than the sum of its proper divisors (33289).

189847 is an equidigital number, since it uses as much as digits as its factorization.

189847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777.

The product of its digits is 16128, while the sum is 37.

The square root of 189847 is about 435.7143559719. The cubic root of 189847 is about 57.4735353955.

The spelling of 189847 in words is "one hundred eighty-nine thousand, eight hundred forty-seven".