33789921 has 16 divisors (see below), whose sum is σ = 51287040. Its totient is φ = 19587920.

The previous prime is 33789919. The next prime is 33789929. The reversal of 33789921 is 12998733.

It is not a de Polignac number, because 33789921 - 2¹ = 33789919 is a prime.

It is a super-2 number, since 2×33789921² = 2283517522372482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33789929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21501 + ... + 23018.

It is an arithmetic number, because the mean of its divisors is an integer number (3205440).

Almost surely, 2^33789921 is an apocalyptic number.

It is an amenable number.

33789921 is a deficient number, since it is larger than the sum of its proper divisors (17497119).

33789921 is a wasteful number, since it uses less digits than its factorization.

33789921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44556.

The product of its digits is 81648, while the sum is 42.

The square root of 33789921 is about 5812.9098565176. The cubic root of 33789921 is about 323.2925713544.

The spelling of 33789921 in words is "thirty-three million, seven hundred eighty-nine thousand, nine hundred twenty-one".