133728899 has 2 divisors, whose sum is σ = 133728900. Its totient is φ = 133728898.

The previous prime is 133728883. The next prime is 133728961. The reversal of 133728899 is 998827331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133728899 - 2⁴ = 133728883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133728499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66864449 + 66864450.

It is an arithmetic number, because the mean of its divisors is an integer number (66864450).

Almost surely, 2^133728899 is an apocalyptic number.

133728899 is a deficient number, since it is larger than the sum of its proper divisors (1).

133728899 is an equidigital number, since it uses as much as digits as its factorization.

133728899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 133728899 is about 11564.1211944531. The cubic root of 133728899 is about 511.3776656445.

The spelling of 133728899 in words is "one hundred thirty-three million, seven hundred twenty-eight thousand, eight hundred ninety-nine".