189188005 has 8 divisors (see below), whose sum is σ = 231309432. Its totient is φ = 148494528.

The previous prime is 189187991. The next prime is 189188011. The reversal of 189188005 is 500881981.

It can be written as a sum of positive squares in 4 ways, for example, as 19589476 + 169598529 = 4426^2 + 13023^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 189188005 - 2¹³ = 189179813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356694 + ... + 357223.

It is an arithmetic number, because the mean of its divisors is an integer number (28913679).

Almost surely, 2^189188005 is an apocalyptic number.

It is an amenable number.

189188005 is a deficient number, since it is larger than the sum of its proper divisors (42121427).

189188005 is an equidigital number, since it uses as much as digits as its factorization.

189188005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713975.

The product of its (nonzero) digits is 23040, while the sum is 40.

The square root of 189188005 is about 13754.5630610354. The cubic root of 189188005 is about 574.0695778178.

The spelling of 189188005 in words is "one hundred eighty-nine million, one hundred eighty-eight thousand, five".