189649 has 4 divisors (see below), whose sum is σ = 192820. Its totient is φ = 186480.

The previous prime is 189643. The next prime is 189653. The reversal of 189649 is 946981.

189649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946981 = 7 ⋅135283.

It can be written as a sum of positive squares in 2 ways, for example, as 17424 + 172225 = 132^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 189649 - 2⁵ = 189617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189643) 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, 1494 + ... + 1615.

It is an arithmetic number, because the mean of its divisors is an integer number (48205).

2¹⁸⁹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

189649 is a deficient number, since it is larger than the sum of its proper divisors (3171).

189649 is an equidigital number, since it uses as much as digits as its factorization.

189649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170.

The product of its digits is 15552, while the sum is 37.

The square root of 189649 is about 435.4870836202. The cubic root of 189649 is about 57.4535478644.

It can be divided in two parts, 189 and 649, that added together give a palindrome (838).

The spelling of 189649 in words is "one hundred eighty-nine thousand, six hundred forty-nine".