189242291 has 4 divisors (see below), whose sum is σ = 216276912. Its totient is φ = 162207672.

The previous prime is 189242243. The next prime is 189242293. The reversal of 189242291 is 192242981.

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

It is a cyclic number.

It is not a de Polignac number, because 189242291 - 2²² = 185047987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189242293) 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, 13517300 + ... + 13517313.

It is an arithmetic number, because the mean of its divisors is an integer number (54069228).

Almost surely, 2^189242291 is an apocalyptic number.

189242291 is a deficient number, since it is larger than the sum of its proper divisors (27034621).

189242291 is an equidigital number, since it uses as much as digits as its factorization.

189242291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27034620.

The product of its digits is 20736, while the sum is 38.

The square root of 189242291 is about 13756.5363009734. The cubic root of 189242291 is about 574.1244808068.

The spelling of 189242291 in words is "one hundred eighty-nine million, two hundred forty-two thousand, two hundred ninety-one".