133728299 has 4 divisors (see below), whose sum is σ = 135026736. Its totient is φ = 132429864.

The previous prime is 133728271. The next prime is 133728313. The reversal of 133728299 is 992827331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133728299 - 2²⁴ = 116951083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133728209) 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, 649064 + ... + 649269.

It is an arithmetic number, because the mean of its divisors is an integer number (33756684).

Almost surely, 2^133728299 is an apocalyptic number.

133728299 is a deficient number, since it is larger than the sum of its proper divisors (1298437).

133728299 is a wasteful number, since it uses less digits than its factorization.

133728299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298436.

The product of its digits is 163296, while the sum is 44.

The square root of 133728299 is about 11564.0952521155. The cubic root of 133728299 is about 511.3769008458.

The spelling of 133728299 in words is "one hundred thirty-three million, seven hundred twenty-eight thousand, two hundred ninety-nine".