723321331 has 4 divisors (see below), whose sum is σ = 723492000. Its totient is φ = 723150664.

The previous prime is 723321301. The next prime is 723321341. The reversal of 723321331 is 133123327.

723321331 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 723321331 - 2⁵ = 723321299 is a prime.

It is a super-2 number, since 2×723321331² = 1046387495759223122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 723321296 and 723321305.

It is not an unprimeable number, because it can be changed into a prime (723321301) 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, 78811 + ... + 87508.

It is an arithmetic number, because the mean of its divisors is an integer number (180873000).

Almost surely, 2^723321331 is an apocalyptic number.

723321331 is a deficient number, since it is larger than the sum of its proper divisors (170669).

723321331 is a wasteful number, since it uses less digits than its factorization.

723321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170668.

The product of its digits is 2268, while the sum is 25.

The square root of 723321331 is about 26894.6338699749. The cubic root of 723321331 is about 897.6570048855.

Adding to 723321331 its reverse (133123327), we get a palindrome (856444658).

The spelling of 723321331 in words is "seven hundred twenty-three million, three hundred twenty-one thousand, three hundred thirty-one".