7368821 has 4 divisors (see below), whose sum is σ = 7374444. Its totient is φ = 7363200.

The previous prime is 7368817. The next prime is 7368833. The reversal of 7368821 is 1288637.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 2937796 + 4431025 = 1714^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 7368821 - 2² = 7368817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7368811) 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, 311 + ... + 3851.

It is an arithmetic number, because the mean of its divisors is an integer number (1843611).

Almost surely, 2^7368821 is an apocalyptic number.

It is an amenable number.

7368821 is a deficient number, since it is larger than the sum of its proper divisors (5623).

7368821 is a wasteful number, since it uses less digits than its factorization.

7368821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5622.

The product of its digits is 16128, while the sum is 35.

The square root of 7368821 is about 2714.5572382987. The cubic root of 7368821 is about 194.5954444187.

The spelling of 7368821 in words is "seven million, three hundred sixty-eight thousand, eight hundred twenty-one".