198305961 has 8 divisors (see below), whose sum is σ = 302180544. Its totient is φ = 113317680.

The previous prime is 198305951. The next prime is 198305999. The reversal of 198305961 is 169503891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198305961 - 2⁵ = 198305929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198305951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4721550 + ... + 4721591.

It is an arithmetic number, because the mean of its divisors is an integer number (37772568).

Almost surely, 2^198305961 is an apocalyptic number.

It is an amenable number.

198305961 is a deficient number, since it is larger than the sum of its proper divisors (103874583).

198305961 is an equidigital number, since it uses as much as digits as its factorization.

198305961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9443151.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 198305961 is about 14082.1149334892. The cubic root of 198305961 is about 583.1477304121.

The spelling of 198305961 in words is "one hundred ninety-eight million, three hundred five thousand, nine hundred sixty-one".