198424891 has 16 divisors (see below), whose sum is σ = 229340160. Its totient is φ = 168164640.

The previous prime is 198424879. The next prime is 198424913.

198424891 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 198424891 - 2⁵ = 198424859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198424801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314146 + ... + 314776.

It is an arithmetic number, because the mean of its divisors is an integer number (14333760).

Almost surely, 2^198424891 is an apocalyptic number.

198424891 is a deficient number, since it is larger than the sum of its proper divisors (30915269).

198424891 is a wasteful number, since it uses less digits than its factorization.

198424891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074.

The product of its digits is 165888, while the sum is 46.

The square root of 198424891 is about 14086.3370327420. The cubic root of 198424891 is about 583.2642841444.

The spelling of 198424891 in words is "one hundred ninety-eight million, four hundred twenty-four thousand, eight hundred ninety-one".