198819495 has 32 divisors (see below), whose sum is σ = 403952640. Its totient is φ = 90888480.

The previous prime is 198819493. The next prime is 198819497. The reversal of 198819495 is 594918891.

It is an interprime number because it is at equal distance from previous prime (198819493) and next prime (198819497).

It is not a de Polignac number, because 198819495 - 2¹ = 198819493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198819493) 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 31 ways as a sum of consecutive naturals, for example, 104251 + ... + 106140.

It is an arithmetic number, because the mean of its divisors is an integer number (12623520).

Almost surely, 2^198819495 is an apocalyptic number.

198819495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198819495 is an abundant number, since it is smaller than the sum of its proper divisors (205133145).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198819495 is a wasteful number, since it uses less digits than its factorization.

198819495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210412 (or 210406 counting only the distinct ones).

The product of its digits is 933120, while the sum is 54.

The square root of 198819495 is about 14100.3366981076. The cubic root of 198819495 is about 583.6506705098.

The spelling of 198819495 in words is "one hundred ninety-eight million, eight hundred nineteen thousand, four hundred ninety-five".