198004553 has 4 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 197876628.

The previous prime is 198004549. The next prime is 198004591. The reversal of 198004553 is 355400891.

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, and also an emirpimes, since its reverse is a distinct semiprime: 355400891 = 43 ⋅8265137.

It is a cyclic number.

It is not a de Polignac number, because 198004553 - 2² = 198004549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198004753) 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, 61613 + ... + 64746.

It is an arithmetic number, because the mean of its divisors is an integer number (49533120).

Almost surely, 2^198004553 is an apocalyptic number.

It is an amenable number.

198004553 is a deficient number, since it is larger than the sum of its proper divisors (127927).

198004553 is a wasteful number, since it uses less digits than its factorization.

198004553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127926.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 198004553 is about 14071.4090623505. The cubic root of 198004553 is about 582.8521358085.

The spelling of 198004553 in words is "one hundred ninety-eight million, four thousand, five hundred fifty-three".