133671738 has 8 divisors (see below), whose sum is σ = 267343488. Its totient is φ = 44557244.

The previous prime is 133671689. The next prime is 133671739. The reversal of 133671738 is 837176331.

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

133671738 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133671696 and 133671705.

It is not an unprimeable number, because it can be changed into a prime (133671739) 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, 11139306 + ... + 11139317.

It is an arithmetic number, because the mean of its divisors is an integer number (33417936).

Almost surely, 2^133671738 is an apocalyptic number.

133671738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133671738 is a wasteful number, since it uses less digits than its factorization.

133671738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22278628.

The product of its digits is 63504, while the sum is 39.

The square root of 133671738 is about 11561.6494497974. The cubic root of 133671738 is about 511.3047942738.

The spelling of 133671738 in words is "one hundred thirty-three million, six hundred seventy-one thousand, seven hundred thirty-eight".