133236394 has 8 divisors (see below), whose sum is σ = 199916100. Its totient is φ = 66597696.

The previous prime is 133236391. The next prime is 133236409. The reversal of 133236394 is 493632331.

It can be written as a sum of positive squares in 2 ways, for example, as 131400369 + 1836025 = 11463^2 + 1355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×133236394² = 35503873372246472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133236391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129 + ... + 16324.

Almost surely, 2^133236394 is an apocalyptic number.

133236394 is a deficient number, since it is larger than the sum of its proper divisors (66679706).

133236394 is a wasteful number, since it uses less digits than its factorization.

133236394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20504.

The product of its digits is 34992, while the sum is 34.

The square root of 133236394 is about 11542.8070242901. The cubic root of 133236394 is about 510.7491157028.

The spelling of 133236394 in words is "one hundred thirty-three million, two hundred thirty-six thousand, three hundred ninety-four".