198924647 has 4 divisors (see below), whose sum is σ = 198953040. Its totient is φ = 198896256.

The previous prime is 198924589. The next prime is 198924653. The reversal of 198924647 is 746429891.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 198924647 - 2⁸ = 198924391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198924595 and 198924604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198924347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4679 + ... + 20487.

It is an arithmetic number, because the mean of its divisors is an integer number (49738260).

Almost surely, 2^198924647 is an apocalyptic number.

198924647 is a deficient number, since it is larger than the sum of its proper divisors (28393).

198924647 is a wasteful number, since it uses less digits than its factorization.

198924647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28392.

The product of its digits is 870912, while the sum is 50.

The square root of 198924647 is about 14104.0649105143. The cubic root of 198924647 is about 583.7535464358.

The spelling of 198924647 in words is "one hundred ninety-eight million, nine hundred twenty-four thousand, six hundred forty-seven".