133973812 has 24 divisors (see below), whose sum is σ = 272343680. Its totient is φ = 56475360.

The previous prime is 133973789. The next prime is 133973813. The reversal of 133973812 is 218379331.

It is a super-2 number, since 2×133973812² = 35897964603622688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133973813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37512 + ... + 40927.

Almost surely, 2^133973812 is an apocalyptic number.

It is an amenable number.

133973812 is an abundant number, since it is smaller than the sum of its proper divisors (138369868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133973812 is a wasteful number, since it uses less digits than its factorization.

133973812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78511 (or 78509 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 133973812 is about 11574.7056982024. The cubic root of 133973812 is about 511.6896566940.

The spelling of 133973812 in words is "one hundred thirty-three million, nine hundred seventy-three thousand, eight hundred twelve".