133688198 has 8 divisors (see below), whose sum is σ = 229179792. Its totient is φ = 57294936.

The previous prime is 133688197. The next prime is 133688227. The reversal of 133688198 is 891886331.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133688197) 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 3 ways as a sum of consecutive naturals, for example, 4774565 + ... + 4774592.

It is an arithmetic number, because the mean of its divisors is an integer number (28647474).

Almost surely, 2^133688198 is an apocalyptic number.

133688198 is a deficient number, since it is larger than the sum of its proper divisors (95491594).

133688198 is an equidigital number, since it uses as much as digits as its factorization.

133688198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9549166.

The product of its digits is 248832, while the sum is 47.

The square root of 133688198 is about 11562.3612640325. The cubic root of 133688198 is about 511.3257803391.

The spelling of 133688198 in words is "one hundred thirty-three million, six hundred eighty-eight thousand, one hundred ninety-eight".