33138635 has 4 divisors (see below), whose sum is σ = 39766368. Its totient is φ = 26510904.

The previous prime is 33138629. The next prime is 33138671. The reversal of 33138635 is 53683133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53683133 = 7 ⋅7669019.

It is a cyclic number.

It is not a de Polignac number, because 33138635 - 2¹² = 33134539 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 3313859 + ... + 3313868.

It is an arithmetic number, because the mean of its divisors is an integer number (9941592).

Almost surely, 2^33138635 is an apocalyptic number.

33138635 is a deficient number, since it is larger than the sum of its proper divisors (6627733).

33138635 is an equidigital number, since it uses as much as digits as its factorization.

33138635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6627732.

The product of its digits is 19440, while the sum is 32.

The square root of 33138635 is about 5756.6166278466. The cubic root of 33138635 is about 321.2019736731.

The spelling of 33138635 in words is "thirty-three million, one hundred thirty-eight thousand, six hundred thirty-five".