189437198 has 4 divisors (see below), whose sum is σ = 284155800. Its totient is φ = 94718598.

The previous prime is 189437197. The next prime is 189437203. The reversal of 189437198 is 891734981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 891734981 = 283 ⋅3151007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189437197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47359298 + ... + 47359301.

It is an arithmetic number, because the mean of its divisors is an integer number (71038950).

Almost surely, 2^189437198 is an apocalyptic number.

189437198 is a deficient number, since it is larger than the sum of its proper divisors (94718602).

189437198 is an equidigital number, since it uses as much as digits as its factorization.

189437198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94718601.

The product of its digits is 435456, while the sum is 50.

The square root of 189437198 is about 13763.6186375531. The cubic root of 189437198 is about 574.3215165481.

The spelling of 189437198 in words is "one hundred eighty-nine million, four hundred thirty-seven thousand, one hundred ninety-eight".