198355129 has 8 divisors (see below), whose sum is σ = 226784448. Its totient is φ = 169949040.

The previous prime is 198355111. The next prime is 198355159. The reversal of 198355129 is 921553891.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198355129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198355159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20379 + ... + 28495.

It is an arithmetic number, because the mean of its divisors is an integer number (28348056).

Almost surely, 2^198355129 is an apocalyptic number.

It is an amenable number.

198355129 is a deficient number, since it is larger than the sum of its proper divisors (28429319).

198355129 is an equidigital number, since it uses as much as digits as its factorization.

198355129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11615.

The product of its digits is 97200, while the sum is 43.

The square root of 198355129 is about 14083.8605857911. The cubic root of 198355129 is about 583.1959216652.

It can be divided in two parts, 19835 and 5129, that added together give a square (24964 = 158²).

The spelling of 198355129 in words is "one hundred ninety-eight million, three hundred fifty-five thousand, one hundred twenty-nine".