198133729 has 4 divisors (see below), whose sum is σ = 208561840. Its totient is φ = 187705620.

The previous prime is 198133711. The next prime is 198133739. The reversal of 198133729 is 927331891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198133729 - 2⁵ = 198133697 is a prime.

It is a super-3 number, since 3×198133729³ (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 (198133709) 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, 5214027 + ... + 5214064.

It is an arithmetic number, because the mean of its divisors is an integer number (52140460).

Almost surely, 2^198133729 is an apocalyptic number.

198133729 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

198133729 is a deficient number, since it is larger than the sum of its proper divisors (10428111).

198133729 is a wasteful number, since it uses less digits than its factorization.

198133729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10428110.

The product of its digits is 81648, while the sum is 43.

The square root of 198133729 is about 14075.9983304915. The cubic root of 198133729 is about 582.9788570368.

The spelling of 198133729 in words is "one hundred ninety-eight million, one hundred thirty-three thousand, seven hundred twenty-nine".