198449633 has 2 divisors, whose sum is σ = 198449634. Its totient is φ = 198449632.

The previous prime is 198449621. The next prime is 198449677. The reversal of 198449633 is 336944891.

It is a happy number.

198449633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146724769 + 51724864 = 12113^2 + 7192^2 .

It is a cyclic number.

It is not a de Polignac number, because 198449633 - 2⁴ = 198449617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_10997786 and since 198449633 and 10997786 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (198442633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99224816 + 99224817.

It is an arithmetic number, because the mean of its divisors is an integer number (99224817).

Almost surely, 2^198449633 is an apocalyptic number.

It is an amenable number.

198449633 is a deficient number, since it is larger than the sum of its proper divisors (1).

198449633 is an equidigital number, since it uses as much as digits as its factorization.

198449633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 47.

The square root of 198449633 is about 14087.2152322594. The cubic root of 198449633 is about 583.2885259370.

The spelling of 198449633 in words is "one hundred ninety-eight million, four hundred forty-nine thousand, six hundred thirty-three".