133773912 has 24 divisors (see below), whose sum is σ = 362304540. Its totient is φ = 44591280.

The previous prime is 133773881. The next prime is 133773919. The reversal of 133773912 is 219377331.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133773919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 928914 + ... + 929057.

Almost surely, 2^133773912 is an apocalyptic number.

133773912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133773912 is an abundant number, since it is smaller than the sum of its proper divisors (228530628).

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

133773912 is a wasteful number, since it uses less digits than its factorization.

133773912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857983 (or 1857976 counting only the distinct ones).

The product of its digits is 23814, while the sum is 36.

The square root of 133773912 is about 11566.0672659292. The cubic root of 133773912 is about 511.4350355943.

The spelling of 133773912 in words is "one hundred thirty-three million, seven hundred seventy-three thousand, nine hundred twelve".