198988481 has 4 divisors (see below), whose sum is σ = 200920512. Its totient is φ = 197056452.

The previous prime is 198988453. The next prime is 198988487. The reversal of 198988481 is 184889891.

198988481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 184889891 = 1453 ⋅127247.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198988481 is a prime.

It is a super-2 number, since 2×198988481² = 79192831141374722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198988487) 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, 965861 + ... + 966066.

It is an arithmetic number, because the mean of its divisors is an integer number (50230128).

Almost surely, 2^198988481 is an apocalyptic number.

It is an amenable number.

198988481 is a deficient number, since it is larger than the sum of its proper divisors (1932031).

198988481 is a wasteful number, since it uses less digits than its factorization.

198988481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932030.

The product of its digits is 1327104, while the sum is 56.

The square root of 198988481 is about 14106.3276936274. The cubic root of 198988481 is about 583.8159810298.

The spelling of 198988481 in words is "one hundred ninety-eight million, nine hundred eighty-eight thousand, four hundred eighty-one".