720323 has 4 divisors (see below), whose sum is σ = 733968. Its totient is φ = 706680.

The previous prime is 720319. The next prime is 720359. The reversal of 720323 is 323027.

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 720323 - 2² = 720319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6743 + ... + 6848.

It is an arithmetic number, because the mean of its divisors is an integer number (183492).

2⁷²⁰³²³ is an apocalyptic number.

720323 is a deficient number, since it is larger than the sum of its proper divisors (13645).

720323 is a wasteful number, since it uses less digits than its factorization.

720323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13644.

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 720323 is about 848.7184456579. The cubic root of 720323 is about 89.6414956472.

The spelling of 720323 in words is "seven hundred twenty thousand, three hundred twenty-three", and thus it is an iban number.