7383821 has 4 divisors (see below), whose sum is σ = 7390812. Its totient is φ = 7376832.

The previous prime is 7383811. The next prime is 7383823. The reversal of 7383821 is 1283837.

7383821 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1283837 = 23 ⋅55819.

It can be written as a sum of positive squares in 2 ways, for example, as 4791721 + 2592100 = 2189^2 + 1610^2 .

It is a cyclic number.

It is not a de Polignac number, because 7383821 - 2²² = 3189517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7383823) 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, 1550 + ... + 4143.

It is an arithmetic number, because the mean of its divisors is an integer number (1847703).

Almost surely, 2^7383821 is an apocalyptic number.

It is an amenable number.

7383821 is a deficient number, since it is larger than the sum of its proper divisors (6991).

7383821 is a wasteful number, since it uses less digits than its factorization.

7383821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990.

The product of its digits is 8064, while the sum is 32.

The square root of 7383821 is about 2717.3187152044. The cubic root of 7383821 is about 194.7273946681.

The spelling of 7383821 in words is "seven million, three hundred eighty-three thousand, eight hundred twenty-one".