198543329 has 2 divisors, whose sum is σ = 198543330. Its totient is φ = 198543328.

The previous prime is 198543307. The next prime is 198543403. The reversal of 198543329 is 923345891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197824225 + 719104 = 14065^2 + 848^2 .

It is a cyclic number.

It is not a de Polignac number, because 198543329 - 2²⁰ = 197494753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198543329.

It is not a weakly prime, because it can be changed into another prime (198533329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99271664 + 99271665.

It is an arithmetic number, because the mean of its divisors is an integer number (99271665).

Almost surely, 2^198543329 is an apocalyptic number.

It is an amenable number.

198543329 is a deficient number, since it is larger than the sum of its proper divisors (1).

198543329 is an equidigital number, since it uses as much as digits as its factorization.

198543329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 198543329 is about 14090.5404083733. The cubic root of 198543329 is about 583.3803094323.

The spelling of 198543329 in words is "one hundred ninety-eight million, five hundred forty-three thousand, three hundred twenty-nine".