198004549 has 2 divisors, whose sum is σ = 198004550. Its totient is φ = 198004548.

The previous prime is 198004519. The next prime is 198004591. The reversal of 198004549 is 945400891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147452449 + 50552100 = 12143^2 + 7110^2 .

It is a cyclic number.

It is not a de Polignac number, because 198004549 - 2⁷ = 198004421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198004519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99002274 + 99002275.

It is an arithmetic number, because the mean of its divisors is an integer number (99002275).

Almost surely, 2^198004549 is an apocalyptic number.

It is an amenable number.

198004549 is a deficient number, since it is larger than the sum of its proper divisors (1).

198004549 is an equidigital number, since it uses as much as digits as its factorization.

198004549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 198004549 is about 14071.4089202183. The cubic root of 198004549 is about 582.8521318836.

The spelling of 198004549 in words is "one hundred ninety-eight million, four thousand, five hundred forty-nine".