189572105 has 4 divisors (see below), whose sum is σ = 227486532. Its totient is φ = 151657680.

The previous prime is 189572041. The next prime is 189572107. The reversal of 189572105 is 501275981.

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 60590656 + 128981449 = 7784^2 + 11357^2 .

It is not a de Polignac number, because 189572105 - 2⁶ = 189572041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189572107) 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, 18957206 + ... + 18957215.

It is an arithmetic number, because the mean of its divisors is an integer number (56871633).

Almost surely, 2^189572105 is an apocalyptic number.

It is an amenable number.

189572105 is a deficient number, since it is larger than the sum of its proper divisors (37914427).

189572105 is an equidigital number, since it uses as much as digits as its factorization.

189572105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37914426.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 189572105 is about 13768.5186203891. The cubic root of 189572105 is about 574.4578178458.

The spelling of 189572105 in words is "one hundred eighty-nine million, five hundred seventy-two thousand, one hundred five".