720555223 has 2 divisors, whose sum is σ = 720555224. Its totient is φ = 720555222.

The previous prime is 720555181. The next prime is 720555229. The reversal of 720555223 is 322555027.

It is a strong prime.

It is an emirp because it is prime and its reverse (322555027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720555223 - 2⁹ = 720554711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720555229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360277611 + 360277612.

It is an arithmetic number, because the mean of its divisors is an integer number (360277612).

Almost surely, 2^720555223 is an apocalyptic number.

720555223 is a deficient number, since it is larger than the sum of its proper divisors (1).

720555223 is an equidigital number, since it uses as much as digits as its factorization.

720555223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 720555223 is about 26843.1597059661. The cubic root of 720555223 is about 896.5112770597.

The spelling of 720555223 in words is "seven hundred twenty million, five hundred fifty-five thousand, two hundred twenty-three".