189653 has 2 divisors, whose sum is σ = 189654.
Its totient is φ = 189652.
The previous prime is 189643. The next prime is 189661. The reversal of 189653 is 356981.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 142129 + 47524 = 377^2 + 218^2
It is an emirp because it is prime and its reverse (356981) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 189653 - 212 = 185557 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (189613) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94826 + 94827.
It is an arithmetic number, because the mean of its divisors is an integer number (94827).
2189653 is an apocalyptic number.
It is an amenable number.
189653 is a deficient number, since it is larger than the sum of its proper divisors (1).
189653 is an equidigital number, since it uses as much as digits as its factorization.
189653 is an evil number, because the sum of its binary digits is even.
The product of its digits is 6480, while the sum is 32.
The square root of 189653 is about 435.4916761547.
The cubic root of 189653 is about 57.4539517905.
The spelling of 189653 in words is "one hundred eighty-nine thousand, six hundred fifty-three".