720547 has 2 divisors, whose sum is σ = 720548. Its totient is φ = 720546.

The previous prime is 720527. The next prime is 720569. The reversal of 720547 is 745027.

It is a weak prime.

It is an emirp because it is prime and its reverse (745027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720547 - 2¹⁵ = 687779 is a prime.

It is not a weakly prime, because it can be changed into another prime (720527) 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 as a sum of consecutive naturals, namely, 360273 + 360274.

It is an arithmetic number, because the mean of its divisors is an integer number (360274).

2⁷²⁰⁵⁴⁷ is an apocalyptic number.

720547 is a deficient number, since it is larger than the sum of its proper divisors (1).

720547 is an equidigital number, since it uses as much as digits as its factorization.

720547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 720547 is about 848.8503990692. The cubic root of 720547 is about 89.6507866708.

The spelling of 720547 in words is "seven hundred twenty thousand, five hundred forty-seven".