198348681 has 4 divisors (see below), whose sum is σ = 264464912. Its totient is φ = 132232452.

The previous prime is 198348671. The next prime is 198348701. The reversal of 198348681 is 186843891.

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.

It is not a de Polignac number, because 198348681 - 2²³ = 189960073 is a prime.

It is a super-2 number, since 2×198348681² = 78684398508879522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198348681.

It is not an unprimeable number, because it can be changed into a prime (198348641) 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, 33058111 + ... + 33058116.

It is an arithmetic number, because the mean of its divisors is an integer number (66116228).

Almost surely, 2^198348681 is an apocalyptic number.

It is an amenable number.

198348681 is a deficient number, since it is larger than the sum of its proper divisors (66116231).

198348681 is an equidigital number, since it uses as much as digits as its factorization.

198348681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66116230.

The product of its digits is 331776, while the sum is 48.

The square root of 198348681 is about 14083.6316694239. The cubic root of 198348681 is about 583.1896022117.

The spelling of 198348681 in words is "one hundred ninety-eight million, three hundred forty-eight thousand, six hundred eighty-one".