11933921 has 4 divisors (see below), whose sum is σ = 12068100. Its totient is φ = 11799744.

The previous prime is 11933903. The next prime is 11933923. The reversal of 11933921 is 12933911.

11933921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12933911 = 1321 ⋅9791.

It can be written as a sum of positive squares in 2 ways, for example, as 6477025 + 5456896 = 2545^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 11933921 - 2¹⁴ = 11917537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11933923) 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, 66956 + ... + 67133.

It is an arithmetic number, because the mean of its divisors is an integer number (3017025).

Almost surely, 2^11933921 is an apocalyptic number.

It is an amenable number.

11933921 is a deficient number, since it is larger than the sum of its proper divisors (134179).

11933921 is an equidigital number, since it uses as much as digits as its factorization.

11933921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134178.

The product of its digits is 1458, while the sum is 29.

The square root of 11933921 is about 3454.5507667423. The cubic root of 11933921 is about 228.5218438387.

The spelling of 11933921 in words is "eleven million, nine hundred thirty-three thousand, nine hundred twenty-one".