198425019 has 8 divisors (see below), whose sum is σ = 284918032. Its totient is φ = 122107680.

The previous prime is 198424943. The next prime is 198425041. The reversal of 198425019 is 910524891.

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

It is not a de Polignac number, because 198425019 - 2⁸ = 198424763 is a prime.

It is a super-2 number, since 2×198425019² = 78744976330300722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 5087821 = 198425019 / (1 + 9 + 8 + 4 + 2 + 5 + 0 + 1 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198425069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2543872 + ... + 2543949.

It is an arithmetic number, because the mean of its divisors is an integer number (35614754).

Almost surely, 2^198425019 is an apocalyptic number.

198425019 is a deficient number, since it is larger than the sum of its proper divisors (86493013).

198425019 is a wasteful number, since it uses less digits than its factorization.

198425019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5087837.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 198425019 is about 14086.3415761510. The cubic root of 198425019 is about 583.2644095618.

The spelling of 198425019 in words is "one hundred ninety-eight million, four hundred twenty-five thousand, nineteen".