189197266 has 4 divisors (see below), whose sum is σ = 283795902. Its totient is φ = 94598632.

The previous prime is 189197263. The next prime is 189197273. The reversal of 189197266 is 662791981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 662791981 = 43 ⋅15413767.

It can be written as a sum of positive squares in only one way, i.e., 128029225 + 61168041 = 11315^2 + 7821^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (189197263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47299315 + ... + 47299318.

Almost surely, 2^189197266 is an apocalyptic number.

189197266 is a deficient number, since it is larger than the sum of its proper divisors (94598636).

189197266 is an equidigital number, since it uses as much as digits as its factorization.

189197266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94598635.

The product of its digits is 326592, while the sum is 49.

The square root of 189197266 is about 13754.8997088310. The cubic root of 189197266 is about 574.0789448169.

The spelling of 189197266 in words is "one hundred eighty-nine million, one hundred ninety-seven thousand, two hundred sixty-six".