189271633 has 4 divisors (see below), whose sum is σ = 191008180. Its totient is φ = 187535088.

The previous prime is 189271631. The next prime is 189271637. The reversal of 189271633 is 336172981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 336172981 = 41 ⋅8199341.

It can be written as a sum of positive squares in 2 ways, for example, as 148669249 + 40602384 = 12193^2 + 6372^2 .

It is a cyclic number.

It is not a de Polignac number, because 189271633 - 2¹ = 189271631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189271631) 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 3 ways as a sum of consecutive naturals, for example, 868110 + ... + 868327.

It is an arithmetic number, because the mean of its divisors is an integer number (47752045).

Almost surely, 2^189271633 is an apocalyptic number.

It is an amenable number.

189271633 is a deficient number, since it is larger than the sum of its proper divisors (1736547).

189271633 is a wasteful number, since it uses less digits than its factorization.

189271633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736546.

The product of its digits is 54432, while the sum is 40.

The square root of 189271633 is about 13757.6027344883. The cubic root of 189271633 is about 574.1541519228.

The spelling of 189271633 in words is "one hundred eighty-nine million, two hundred seventy-one thousand, six hundred thirty-three".