198804749 has 32 divisors (see below), whose sum is σ = 252129024. Its totient is φ = 153953280.

The previous prime is 198804731. The next prime is 198804751. The reversal of 198804749 is 947408891.

198804749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198804749 - 2⁸ = 198804493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198804697 and 198804706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198804779) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128072 + ... + 129614.

It is an arithmetic number, because the mean of its divisors is an integer number (7879032).

Almost surely, 2^198804749 is an apocalyptic number.

It is an amenable number.

198804749 is a deficient number, since it is larger than the sum of its proper divisors (53324275).

198804749 is a wasteful number, since it uses less digits than its factorization.

198804749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 198804749 is about 14099.8137930967. The cubic root of 198804749 is about 583.6362407954.

The spelling of 198804749 in words is "one hundred ninety-eight million, eight hundred four thousand, seven hundred forty-nine".