198435553 has 4 divisors (see below), whose sum is σ = 198543040. Its totient is φ = 198328068.

The previous prime is 198435529. The next prime is 198435581. The reversal of 198435553 is 355534891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198435553 - 2¹⁷ = 198304481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198435953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50925 + ... + 54682.

It is an arithmetic number, because the mean of its divisors is an integer number (49635760).

Almost surely, 2^198435553 is an apocalyptic number.

It is an amenable number.

198435553 is a deficient number, since it is larger than the sum of its proper divisors (107487).

198435553 is a wasteful number, since it uses less digits than its factorization.

198435553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107486.

The product of its digits is 324000, while the sum is 43.

The square root of 198435553 is about 14086.7154794863. The cubic root of 198435553 is about 583.2747308385.

The spelling of 198435553 in words is "one hundred ninety-eight million, four hundred thirty-five thousand, five hundred fifty-three".