133409394 has 24 divisors (see below), whose sum is σ = 289360812. Its totient is φ = 44422560.

The previous prime is 133409389. The next prime is 133409417. The reversal of 133409394 is 493904331.

It can be written as a sum of positive squares in 2 ways, for example, as 121815369 + 11594025 = 11037^2 + 3405^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16284 + ... + 23064.

Almost surely, 2^133409394 is an apocalyptic number.

133409394 is an abundant number, since it is smaller than the sum of its proper divisors (155951418).

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

133409394 is a wasteful number, since it uses less digits than its factorization.

133409394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7882 (or 7879 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 133409394 is about 11550.2984377028. The cubic root of 133409394 is about 510.9700798068.

The spelling of 133409394 in words is "one hundred thirty-three million, four hundred nine thousand, three hundred ninety-four".