189456005 has 4 divisors (see below), whose sum is σ = 227347212. Its totient is φ = 151564800.

The previous prime is 189455993. The next prime is 189456023. The reversal of 189456005 is 500654981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500654981 = 17 ⋅29450293.

It can be written as a sum of positive squares in 2 ways, for example, as 73290721 + 116165284 = 8561^2 + 10778^2 .

It is a de Polignac number, because none of the positive numbers 2^k-189456005 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189456005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18945596 + ... + 18945605.

It is an arithmetic number, because the mean of its divisors is an integer number (56836803).

Almost surely, 2^189456005 is an apocalyptic number.

It is an amenable number.

189456005 is a deficient number, since it is larger than the sum of its proper divisors (37891207).

189456005 is an equidigital number, since it uses as much as digits as its factorization.

189456005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37891206.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 189456005 is about 13764.3018348189. The cubic root of 189456005 is about 574.3405218042.

The spelling of 189456005 in words is "one hundred eighty-nine million, four hundred fifty-six thousand, five".