198273242 has 4 divisors (see below), whose sum is σ = 297409866. Its totient is φ = 99136620.

The previous prime is 198273239. The next prime is 198273263. The reversal of 198273242 is 242372891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242372891 = 233 ⋅1040227.

It can be written as a sum of positive squares in only one way, i.e., 102839881 + 95433361 = 10141^2 + 9769^2 .

It is a junction number, because it is equal to n+sod(n) for n = 198273196 and 198273205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49568309 + ... + 49568312.

Almost surely, 2^198273242 is an apocalyptic number.

198273242 is a deficient number, since it is larger than the sum of its proper divisors (99136624).

198273242 is an equidigital number, since it uses as much as digits as its factorization.

198273242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99136623.

The product of its digits is 48384, while the sum is 38.

The square root of 198273242 is about 14080.9531637599. The cubic root of 198273242 is about 583.1156569771.

The spelling of 198273242 in words is "one hundred ninety-eight million, two hundred seventy-three thousand, two hundred forty-two".