133784825 has 24 divisors (see below), whose sum is σ = 171634848. Its totient is φ = 103380480.

The previous prime is 133784821. The next prime is 133784839. The reversal of 133784825 is 528487331.

It is not a de Polignac number, because 133784825 - 2² = 133784821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133784821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103634 + ... + 104916.

It is an arithmetic number, because the mean of its divisors is an integer number (7151452).

Almost surely, 2^133784825 is an apocalyptic number.

It is an amenable number.

133784825 is a deficient number, since it is larger than the sum of its proper divisors (37850023).

133784825 is a wasteful number, since it uses less digits than its factorization.

133784825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433 (or 1428 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 133784825 is about 11566.5390242717. The cubic root of 133784825 is about 511.4489424882.

The spelling of 133784825 in words is "one hundred thirty-three million, seven hundred eighty-four thousand, eight hundred twenty-five".