189247271 has 4 divisors (see below), whose sum is σ = 189511200. Its totient is φ = 188983344.

The previous prime is 189247237. The next prime is 189247273. The reversal of 189247271 is 172742981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172742981 = 7459 ⋅23159.

It is a cyclic number.

It is not a de Polignac number, because 189247271 - 2¹⁸ = 188985127 is a prime.

It is a super-3 number, since 3×189247271³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189247273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130886 + ... + 132323.

It is an arithmetic number, because the mean of its divisors is an integer number (47377800).

Almost surely, 2^189247271 is an apocalyptic number.

189247271 is a deficient number, since it is larger than the sum of its proper divisors (263929).

189247271 is an equidigital number, since it uses as much as digits as its factorization.

189247271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263928.

The product of its digits is 56448, while the sum is 41.

The square root of 189247271 is about 13756.7173046479. The cubic root of 189247271 is about 574.1295168813.

The spelling of 189247271 in words is "one hundred eighty-nine million, two hundred forty-seven thousand, two hundred seventy-one".