720323423 has 2 divisors, whose sum is σ = 720323424. Its totient is φ = 720323422.

The previous prime is 720323411. The next prime is 720323447. The reversal of 720323423 is 324323027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720323423 - 2²² = 716129119 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 720323392 and 720323401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720320423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360161711 + 360161712.

It is an arithmetic number, because the mean of its divisors is an integer number (360161712).

Almost surely, 2^720323423 is an apocalyptic number.

720323423 is a deficient number, since it is larger than the sum of its proper divisors (1).

720323423 is an equidigital number, since it uses as much as digits as its factorization.

720323423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 26.

The square root of 720323423 is about 26838.8416851398. The cubic root of 720323423 is about 896.4151319411.

The spelling of 720323423 in words is "seven hundred twenty million, three hundred twenty-three thousand, four hundred twenty-three".