198731441 has 4 divisors (see below), whose sum is σ = 199174500. Its totient is φ = 198288384.

The previous prime is 198731437. The next prime is 198731443. The reversal of 198731441 is 144137891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 118897216 + 79834225 = 10904^2 + 8935^2 .

It is a cyclic number.

It is not a de Polignac number, because 198731441 - 2² = 198731437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198731395 and 198731404.

It is not an unprimeable number, because it can be changed into a prime (198731443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220856 + ... + 221753.

It is an arithmetic number, because the mean of its divisors is an integer number (49793625).

Almost surely, 2^198731441 is an apocalyptic number.

It is an amenable number.

198731441 is a deficient number, since it is larger than the sum of its proper divisors (443059).

198731441 is an equidigital number, since it uses as much as digits as its factorization.

198731441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443058.

The product of its digits is 24192, while the sum is 38.

The square root of 198731441 is about 14097.2139446062. The cubic root of 198731441 is about 583.5644945792.

The spelling of 198731441 in words is "one hundred ninety-eight million, seven hundred thirty-one thousand, four hundred forty-one".