33121889 has 4 divisors (see below), whose sum is σ = 33134256. Its totient is φ = 33109524.

The previous prime is 33121867. The next prime is 33121901. The reversal of 33121889 is 98812133.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98812133 = 7 ⋅14116019.

It is a cyclic number.

It is not a de Polignac number, because 33121889 - 2¹² = 33117793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33121859) 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, 299 + ... + 8144.

It is an arithmetic number, because the mean of its divisors is an integer number (8283564).

Almost surely, 2^33121889 is an apocalyptic number.

It is an amenable number.

33121889 is a deficient number, since it is larger than the sum of its proper divisors (12367).

33121889 is an equidigital number, since it uses as much as digits as its factorization.

33121889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12366.

The product of its digits is 10368, while the sum is 35.

The square root of 33121889 is about 5755.1619438553. The cubic root of 33121889 is about 321.1478600528.

The spelling of 33121889 in words is "thirty-three million, one hundred twenty-one thousand, eight hundred eighty-nine".