198896913 has 12 divisors (see below), whose sum is σ = 288756468. Its totient is φ = 131923680.

The previous prime is 198896891. The next prime is 198896953. The reversal of 198896913 is 319698891.

It can be written as a sum of positive squares in 2 ways, for example, as 194686209 + 4210704 = 13953^2 + 2052^2 .

It is not a de Polignac number, because 198896913 - 2⁵ = 198896881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198896913.

It is not an unprimeable number, because it can be changed into a prime (198896953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54318 + ... + 57863.

It is an arithmetic number, because the mean of its divisors is an integer number (24063039).

Almost surely, 2^198896913 is an apocalyptic number.

It is an amenable number.

198896913 is a deficient number, since it is larger than the sum of its proper divisors (89859555).

198896913 is a wasteful number, since it uses less digits than its factorization.

198896913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112384 (or 112381 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 198896913 is about 14103.0816845114. The cubic root of 198896913 is about 583.7264162744.

It can be divided in two parts, 198896 and 913, that added together give a square (199809 = 447²).

The spelling of 198896913 in words is "one hundred ninety-eight million, eight hundred ninety-six thousand, nine hundred thirteen".