33793921 has 4 divisors (see below), whose sum is σ = 38621632. Its totient is φ = 28966212.

The previous prime is 33793901. The next prime is 33793931. The reversal of 33793921 is 12939733.

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 an emirpimes, since its reverse is a distinct semiprime: 12939733 = 313 ⋅41341.

It is a cyclic number.

It is not a de Polignac number, because 33793921 - 2¹⁹ = 33269633 is a prime.

It is a super-2 number, since 2×33793921² = 2284058193108482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33793901) 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, 2413845 + ... + 2413858.

It is an arithmetic number, because the mean of its divisors is an integer number (9655408).

Almost surely, 2^33793921 is an apocalyptic number.

It is an amenable number.

33793921 is a deficient number, since it is larger than the sum of its proper divisors (4827711).

33793921 is an equidigital number, since it uses as much as digits as its factorization.

33793921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4827710.

The product of its digits is 30618, while the sum is 37.

The square root of 33793921 is about 5813.2539080966. The cubic root of 33793921 is about 323.3053278137.

The spelling of 33793921 in words is "thirty-three million, seven hundred ninety-three thousand, nine hundred twenty-one".