198327409 has 8 divisors (see below), whose sum is σ = 230376128. Its totient is φ = 167207760.

The previous prime is 198327401. The next prime is 198327419. The reversal of 198327409 is 904723891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198327409 - 2³ = 198327401 is a prime.

It is a super-2 number, since 2×198327409² = 78667522321306562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198327401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231807 + ... + 232660.

It is an arithmetic number, because the mean of its divisors is an integer number (28797016).

Almost surely, 2^198327409 is an apocalyptic number.

It is an amenable number.

198327409 is a deficient number, since it is larger than the sum of its proper divisors (32048719).

198327409 is an equidigital number, since it uses as much as digits as its factorization.

198327409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464535.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 198327409 is about 14082.8764462378. The cubic root of 198327409 is about 583.1687533163.

It can be divided in two parts, 1983 and 27409, that added together give a palindrome (29392).

The spelling of 198327409 in words is "one hundred ninety-eight million, three hundred twenty-seven thousand, four hundred nine".