33138907 has 8 divisors (see below), whose sum is σ = 36008960. Its totient is φ = 30381480.

The previous prime is 33138893. The next prime is 33138923. The reversal of 33138907 is 70983133.

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

It is a cyclic number.

It is not a de Polignac number, because 33138907 - 2⁷ = 33138779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33138307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27543 + ... + 28720.

It is an arithmetic number, because the mean of its divisors is an integer number (4501120).

Almost surely, 2^33138907 is an apocalyptic number.

33138907 is a deficient number, since it is larger than the sum of its proper divisors (2870053).

33138907 is a wasteful number, since it uses less digits than its factorization.

33138907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56313.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 33138907 is about 5756.6402527863. The cubic root of 33138907 is about 321.2028524731.

The spelling of 33138907 in words is "thirty-three million, one hundred thirty-eight thousand, nine hundred seven".