133644172 has 12 divisors (see below), whose sum is σ = 239316616. Its totient is φ = 65268000.

The previous prime is 133644139. The next prime is 133644179. The reversal of 133644172 is 271446331.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (133644179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388329 + ... + 388672.

Almost surely, 2^133644172 is an apocalyptic number.

It is an amenable number.

133644172 is a deficient number, since it is larger than the sum of its proper divisors (105672444).

133644172 is a wasteful number, since it uses less digits than its factorization.

133644172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777048 (or 777046 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 133644172 is about 11560.4572573925. The cubic root of 133644172 is about 511.2696444928.

The spelling of 133644172 in words is "one hundred thirty-three million, six hundred forty-four thousand, one hundred seventy-two".