133644445 has 8 divisors (see below), whose sum is σ = 174952800. Its totient is φ = 97195920.

The previous prime is 133644439. The next prime is 133644491. The reversal of 133644445 is 544446331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133644445 - 2¹⁵ = 133611677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133644445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214895 + ... + 1215004.

It is an arithmetic number, because the mean of its divisors is an integer number (21869100).

Almost surely, 2^133644445 is an apocalyptic number.

It is an amenable number.

133644445 is a deficient number, since it is larger than the sum of its proper divisors (41308355).

133644445 is a wasteful number, since it uses less digits than its factorization.

133644445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429915.

The product of its digits is 69120, while the sum is 34.

The square root of 133644445 is about 11560.4690648779. The cubic root of 133644445 is about 511.2699926225.

The spelling of 133644445 in words is "one hundred thirty-three million, six hundred forty-four thousand, four hundred forty-five".