189394445 has 4 divisors (see below), whose sum is σ = 227273340. Its totient is φ = 151515552.

The previous prime is 189394423. The next prime is 189394459. The reversal of 189394445 is 544493981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103164649 + 86229796 = 10157^2 + 9286^2 .

It is a cyclic number.

It is not a de Polignac number, because 189394445 - 2¹⁸ = 189132301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189394445.

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, 18939440 + ... + 18939449.

It is an arithmetic number, because the mean of its divisors is an integer number (56818335).

Almost surely, 2^189394445 is an apocalyptic number.

It is an amenable number.

189394445 is a deficient number, since it is larger than the sum of its proper divisors (37878895).

189394445 is an equidigital number, since it uses as much as digits as its factorization.

189394445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37878894.

The product of its digits is 622080, while the sum is 47.

The square root of 189394445 is about 13762.0654336477. The cubic root of 189394445 is about 574.2783081825.

The spelling of 189394445 in words is "one hundred eighty-nine million, three hundred ninety-four thousand, four hundred forty-five".