720497 has 2 divisors, whose sum is σ = 720498. Its totient is φ = 720496.

The previous prime is 720491. The next prime is 720527. The reversal of 720497 is 794027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 579121 + 141376 = 761^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 720497 - 2⁴ = 720481 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720497.

It is not a weakly prime, because it can be changed into another prime (720491) 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, 360248 + 360249.

It is an arithmetic number, because the mean of its divisors is an integer number (360249).

2⁷²⁰⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

720497 is a deficient number, since it is larger than the sum of its proper divisors (1).

720497 is an equidigital number, since it uses as much as digits as its factorization.

720497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 720497 is about 848.8209469611. The cubic root of 720497 is about 89.6487129485.

The spelling of 720497 in words is "seven hundred twenty thousand, four hundred ninety-seven".