198414721 has 8 divisors (see below), whose sum is σ = 207414144. Its totient is φ = 189446400.

The previous prime is 198414719. The next prime is 198414751. The reversal of 198414721 is 127414891.

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

It is not a de Polignac number, because 198414721 - 2¹ = 198414719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198414751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5796 + ... + 20746.

It is an arithmetic number, because the mean of its divisors is an integer number (25926768).

Almost surely, 2^198414721 is an apocalyptic number.

It is an amenable number.

198414721 is a deficient number, since it is larger than the sum of its proper divisors (8999423).

198414721 is a wasteful number, since it uses less digits than its factorization.

198414721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15551.

The product of its digits is 16128, while the sum is 37.

The square root of 198414721 is about 14085.9760400194. The cubic root of 198414721 is about 583.2543191663.

The spelling of 198414721 in words is "one hundred ninety-eight million, four hundred fourteen thousand, seven hundred twenty-one".