7343821 has 4 divisors (see below), whose sum is σ = 7349472. Its totient is φ = 7338172.

The previous prime is 7343771. The next prime is 7343827. The reversal of 7343821 is 1283437.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7343821 is a prime.

It is a Duffinian number.

7343821 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7343821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7343827) 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, 216 + ... + 3838.

It is an arithmetic number, because the mean of its divisors is an integer number (1837368).

Almost surely, 2^7343821 is an apocalyptic number.

It is an amenable number.

7343821 is a deficient number, since it is larger than the sum of its proper divisors (5651).

7343821 is a wasteful number, since it uses less digits than its factorization.

7343821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650.

The product of its digits is 4032, while the sum is 28.

The square root of 7343821 is about 2709.9485234963. The cubic root of 7343821 is about 194.3751288413.

The spelling of 7343821 in words is "seven million, three hundred forty-three thousand, eight hundred twenty-one".