133729418 has 8 divisors (see below), whose sum is σ = 201455748. Its totient is φ = 66577504.

The previous prime is 133729417. The next prime is 133729439. The reversal of 133729418 is 814927331.

133729418 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 131721529 + 2007889 = 11477^2 + 1417^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133729417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143021 + ... + 143952.

Almost surely, 2^133729418 is an apocalyptic number.

133729418 is a deficient number, since it is larger than the sum of its proper divisors (67726330).

133729418 is a wasteful number, since it uses less digits than its factorization.

133729418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287208.

The product of its digits is 36288, while the sum is 38.

The square root of 133729418 is about 11564.1436345282. The cubic root of 133729418 is about 511.3783271935.

The spelling of 133729418 in words is "one hundred thirty-three million, seven hundred twenty-nine thousand, four hundred eighteen".