105272189 has 4 divisors (see below), whose sum is σ = 114842400. Its totient is φ = 95701980.

The previous prime is 105272183. The next prime is 105272207. The reversal of 105272189 is 981272501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-105272189 is a prime.

It is a super-2 number, since 2×105272189² = 22164467553703442, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105272183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4785089 + ... + 4785110.

It is an arithmetic number, because the mean of its divisors is an integer number (28710600).

Almost surely, 2^105272189 is an apocalyptic number.

It is an amenable number.

105272189 is a deficient number, since it is larger than the sum of its proper divisors (9570211).

105272189 is an equidigital number, since it uses as much as digits as its factorization.

105272189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570210.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 105272189 is about 10260.2236330404. The cubic root of 105272189 is about 472.1766984817.

The spelling of 105272189 in words is "one hundred five million, two hundred seventy-two thousand, one hundred eighty-nine".