33007921 has 8 divisors (see below), whose sum is σ = 36256320. Its totient is φ = 29910672.

The previous prime is 33007907. The next prime is 33007927. The reversal of 33007921 is 12970033.

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

It is not a de Polignac number, because 33007921 - 2⁹ = 33007409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33007927) 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, 37330 + ... + 38203.

It is an arithmetic number, because the mean of its divisors is an integer number (4532040).

Almost surely, 2^33007921 is an apocalyptic number.

It is an amenable number.

33007921 is a deficient number, since it is larger than the sum of its proper divisors (3248399).

33007921 is a wasteful number, since it uses less digits than its factorization.

33007921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75575.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 33007921 is about 5745.2520397281. The cubic root of 33007921 is about 320.7790944611.

Adding to 33007921 its reverse (12970033), we get a palindrome (45977954).

The spelling of 33007921 in words is "thirty-three million, seven thousand, nine hundred twenty-one".