198941773 has 4 divisors (see below), whose sum is σ = 199106460. Its totient is φ = 198777088.

The previous prime is 198941749. The next prime is 198941777. The reversal of 198941773 is 377149891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 377149891 = 619 ⋅609289.

It can be written as a sum of positive squares in 2 ways, for example, as 78535044 + 120406729 = 8862^2 + 10973^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198941773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198941777) 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, 80518 + ... + 82951.

It is an arithmetic number, because the mean of its divisors is an integer number (49776615).

Almost surely, 2^198941773 is an apocalyptic number.

It is an amenable number.

198941773 is a deficient number, since it is larger than the sum of its proper divisors (164687).

198941773 is a wasteful number, since it uses less digits than its factorization.

198941773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164686.

The product of its digits is 381024, while the sum is 49.

The square root of 198941773 is about 14104.6720273816. The cubic root of 198941773 is about 583.7702983005.

The spelling of 198941773 in words is "one hundred ninety-eight million, nine hundred forty-one thousand, seven hundred seventy-three".