133273645 has 4 divisors (see below), whose sum is σ = 159928380. Its totient is φ = 106618912.

The previous prime is 133273643. The next prime is 133273663. The reversal of 133273645 is 546372331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546372331 = 2003 ⋅272777.

It can be written as a sum of positive squares in 2 ways, for example, as 92275236 + 40998409 = 9606^2 + 6403^2 .

It is a cyclic number.

It is not a de Polignac number, because 133273645 - 2¹ = 133273643 is a prime.

It is a super-3 number, since 3×133273645³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133273645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133273643) 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, 13327360 + ... + 13327369.

It is an arithmetic number, because the mean of its divisors is an integer number (39982095).

Almost surely, 2^133273645 is an apocalyptic number.

It is an amenable number.

133273645 is a deficient number, since it is larger than the sum of its proper divisors (26654735).

133273645 is an equidigital number, since it uses as much as digits as its factorization.

133273645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26654734.

The product of its digits is 45360, while the sum is 34.

The square root of 133273645 is about 11544.4205138240. The cubic root of 133273645 is about 510.7967106626.

The spelling of 133273645 in words is "one hundred thirty-three million, two hundred seventy-three thousand, six hundred forty-five".