198136499 has 4 divisors (see below), whose sum is σ = 216148920. Its totient is φ = 180124080.

The previous prime is 198136483. The next prime is 198136619. The reversal of 198136499 is 994631891.

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 198136499 - 2⁴ = 198136483 is a prime.

It is a super-3 number, since 3×198136499³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198136409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9006194 + ... + 9006215.

It is an arithmetic number, because the mean of its divisors is an integer number (54037230).

Almost surely, 2^198136499 is an apocalyptic number.

198136499 is a deficient number, since it is larger than the sum of its proper divisors (18012421).

198136499 is a wasteful number, since it uses less digits than its factorization.

198136499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18012420.

The product of its digits is 419904, while the sum is 50.

The square root of 198136499 is about 14076.0967245895. The cubic root of 198136499 is about 582.9815737944.

The spelling of 198136499 in words is "one hundred ninety-eight million, one hundred thirty-six thousand, four hundred ninety-nine".