198864401 has 4 divisors (see below), whose sum is σ = 200084592. Its totient is φ = 197644212.

The previous prime is 198864377. The next prime is 198864403. The reversal of 198864401 is 104468891.

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 198864401 - 2¹⁴ = 198848017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198864403) 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, 609851 + ... + 610176.

It is an arithmetic number, because the mean of its divisors is an integer number (50021148).

Almost surely, 2^198864401 is an apocalyptic number.

It is an amenable number.

198864401 is a deficient number, since it is larger than the sum of its proper divisors (1220191).

198864401 is a wasteful number, since it uses less digits than its factorization.

198864401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220190.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 198864401 is about 14101.9289815259. The cubic root of 198864401 is about 583.6946089308.

The spelling of 198864401 in words is "one hundred ninety-eight million, eight hundred sixty-four thousand, four hundred one".