198271913 has 4 divisors (see below), whose sum is σ = 226596480. Its totient is φ = 169947348.

The previous prime is 198271903. The next prime is 198271921. The reversal of 198271913 is 319172891.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 198271913 - 2⁶ = 198271849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198271903) 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, 14162273 + ... + 14162286.

It is an arithmetic number, because the mean of its divisors is an integer number (56649120).

Almost surely, 2^198271913 is an apocalyptic number.

It is an amenable number.

198271913 is a deficient number, since it is larger than the sum of its proper divisors (28324567).

198271913 is an equidigital number, since it uses as much as digits as its factorization.

198271913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28324566.

The product of its digits is 27216, while the sum is 41.

The square root of 198271913 is about 14080.9059722732. The cubic root of 198271913 is about 583.1143541245.

The spelling of 198271913 in words is "one hundred ninety-eight million, two hundred seventy-one thousand, nine hundred thirteen".