133728039 has 6 divisors (see below), whose sum is σ = 193162736. Its totient is φ = 89152020.

The previous prime is 133728013. The next prime is 133728071. The reversal of 133728039 is 930827331.

It is a happy number.

It is not a de Polignac number, because 133728039 - 2¹² = 133723943 is a prime.

It is a super-3 number, since 3×133728039³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133727994 and 133728012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133728139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7429327 + ... + 7429344.

Almost surely, 2^133728039 is an apocalyptic number.

133728039 is a deficient number, since it is larger than the sum of its proper divisors (59434697).

133728039 is a wasteful number, since it uses less digits than its factorization.

133728039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14858677 (or 14858674 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 133728039 is about 11564.0840104178. The cubic root of 133728039 is about 511.3765694324.

The spelling of 133728039 in words is "one hundred thirty-three million, seven hundred twenty-eight thousand, thirty-nine".