33994021 has 4 divisors (see below), whose sum is σ = 35783200. Its totient is φ = 32204844.

The previous prime is 33994013. The next prime is 33994049. The reversal of 33994021 is 12049933.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33994021 - 2³ = 33994013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33994091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894561 + ... + 894598.

It is an arithmetic number, because the mean of its divisors is an integer number (8945800).

Almost surely, 2^33994021 is an apocalyptic number.

It is an amenable number.

33994021 is a deficient number, since it is larger than the sum of its proper divisors (1789179).

33994021 is a wasteful number, since it uses less digits than its factorization.

33994021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789178.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 33994021 is about 5830.4391772833. The cubic root of 33994021 is about 323.9421891724.

The spelling of 33994021 in words is "thirty-three million, nine hundred ninety-four thousand, twenty-one".