198290121 has 8 divisors (see below), whose sum is σ = 264453024. Its totient is φ = 132160320.

The previous prime is 198290117. The next prime is 198290129. The reversal of 198290121 is 121092891.

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

It is not a de Polignac number, because 198290121 - 2² = 198290117 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (198290129) 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, 15306 + ... + 25116.

It is an arithmetic number, because the mean of its divisors is an integer number (33056628).

Almost surely, 2^198290121 is an apocalyptic number.

It is an amenable number.

198290121 is a deficient number, since it is larger than the sum of its proper divisors (66162903).

198290121 is an equidigital number, since it uses as much as digits as its factorization.

198290121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16551.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 198290121 is about 14081.5525067373. The cubic root of 198290121 is about 583.1322033852.

The spelling of 198290121 in words is "one hundred ninety-eight million, two hundred ninety thousand, one hundred twenty-one".