198646633 has 4 divisors (see below), whose sum is σ = 199865488. Its totient is φ = 197427780.

The previous prime is 198646631. The next prime is 198646661. The reversal of 198646633 is 336646891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 336646891 = 7 ⋅48092413.

It is a cyclic number.

It is not a de Polignac number, because 198646633 - 2¹ = 198646631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198646631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609183 + ... + 609508.

It is an arithmetic number, because the mean of its divisors is an integer number (49966372).

Almost surely, 2^198646633 is an apocalyptic number.

It is an amenable number.

198646633 is a deficient number, since it is larger than the sum of its proper divisors (1218855).

198646633 is a wasteful number, since it uses less digits than its factorization.

198646633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218854.

The product of its digits is 559872, while the sum is 46.

The square root of 198646633 is about 14094.2056533882. The cubic root of 198646633 is about 583.4814713476.

The spelling of 198646633 in words is "one hundred ninety-eight million, six hundred forty-six thousand, six hundred thirty-three".