198430019 has 4 divisors (see below), whose sum is σ = 201224880. Its totient is φ = 195635160.

The previous prime is 198429983. The next prime is 198430051. The reversal of 198430019 is 910034891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198430019 - 2¹² = 198425923 is a prime.

It is a super-2 number, since 2×198430019² = 78748944880680722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198430619) 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, 1397324 + ... + 1397465.

It is an arithmetic number, because the mean of its divisors is an integer number (50306220).

Almost surely, 2^198430019 is an apocalyptic number.

198430019 is a deficient number, since it is larger than the sum of its proper divisors (2794861).

198430019 is an equidigital number, since it uses as much as digits as its factorization.

198430019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2794860.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 198430019 is about 14086.5190519163. The cubic root of 198430019 is about 583.2693086375.

The spelling of 198430019 in words is "one hundred ninety-eight million, four hundred thirty thousand, nineteen".