2721323 has 4 divisors (see below), whose sum is σ = 2968728. Its totient is φ = 2473920.

The previous prime is 2721319. The next prime is 2721371. The reversal of 2721323 is 3231272.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2721323 - 2² = 2721319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2721295 and 2721304.

It is not an unprimeable number, because it can be changed into a prime (2721023) 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, 123686 + ... + 123707.

It is an arithmetic number, because the mean of its divisors is an integer number (742182).

2^2721323 is an apocalyptic number.

2721323 is a deficient number, since it is larger than the sum of its proper divisors (247405).

2721323 is a wasteful number, since it uses less digits than its factorization.

2721323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247404.

The product of its digits is 504, while the sum is 20.

The square root of 2721323 is about 1649.6432947762. The cubic root of 2721323 is about 139.6132694288.

Adding to 2721323 its reverse (3231272), we get a palindrome (5952595).

The spelling of 2721323 in words is "two million, seven hundred twenty-one thousand, three hundred twenty-three".