198409327 has 2 divisors, whose sum is σ = 198409328. Its totient is φ = 198409326.

The previous prime is 198409313. The next prime is 198409357. The reversal of 198409327 is 723904891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198409327 - 2⁷ = 198409199 is a prime.

It is a super-2 number, since 2×198409327² = 78732522081185858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198409357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99204663 + 99204664.

It is an arithmetic number, because the mean of its divisors is an integer number (99204664).

Almost surely, 2^198409327 is an apocalyptic number.

198409327 is a deficient number, since it is larger than the sum of its proper divisors (1).

198409327 is an equidigital number, since it uses as much as digits as its factorization.

198409327 is an odious number, because the sum of its binary digits is odd.

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

The square root of 198409327 is about 14085.7845716879. The cubic root of 198409327 is about 583.2490337683.

The spelling of 198409327 in words is "one hundred ninety-eight million, four hundred nine thousand, three hundred twenty-seven".