133678273 has 4 divisors (see below), whose sum is σ = 133702740. Its totient is φ = 133653808.

The previous prime is 133678229. The next prime is 133678289. The reversal of 133678273 is 372876331.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 113039424 + 20638849 = 10632^2 + 4543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133678273 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133678073) 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, 123 + ... + 16351.

It is an arithmetic number, because the mean of its divisors is an integer number (33425685).

Almost surely, 2^133678273 is an apocalyptic number.

It is an amenable number.

133678273 is a deficient number, since it is larger than the sum of its proper divisors (24467).

133678273 is an equidigital number, since it uses as much as digits as its factorization.

133678273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24466.

The product of its digits is 127008, while the sum is 40.

The square root of 133678273 is about 11561.9320617274. The cubic root of 133678273 is about 511.3131264324.

The spelling of 133678273 in words is "one hundred thirty-three million, six hundred seventy-eight thousand, two hundred seventy-three".