720810323 has 4 divisors (see below), whose sum is σ = 721058520. Its totient is φ = 720562128.

The previous prime is 720810313. The next prime is 720810331. The reversal of 720810323 is 323018027.

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 720810323 - 2¹² = 720806227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720810292 and 720810301.

It is not an unprimeable number, because it can be changed into a prime (720810313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119690 + ... + 125567.

It is an arithmetic number, because the mean of its divisors is an integer number (180264630).

Almost surely, 2^720810323 is an apocalyptic number.

720810323 is a deficient number, since it is larger than the sum of its proper divisors (248197).

720810323 is a wasteful number, since it uses less digits than its factorization.

720810323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248196.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 720810323 is about 26847.9109615627. The cubic root of 720810323 is about 896.6170626334.

The spelling of 720810323 in words is "seven hundred twenty million, eight hundred ten thousand, three hundred twenty-three".