720605597 has 2 divisors, whose sum is σ = 720605598. Its totient is φ = 720605596.

The previous prime is 720605593. The next prime is 720605603. The reversal of 720605597 is 795506027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710275801 + 10329796 = 26651^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 720605597 - 2² = 720605593 is a prime.

It is a super-3 number, since 3×720605597³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720605593) 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 as a sum of consecutive naturals, namely, 360302798 + 360302799.

It is an arithmetic number, because the mean of its divisors is an integer number (360302799).

Almost surely, 2^720605597 is an apocalyptic number.

It is an amenable number.

720605597 is a deficient number, since it is larger than the sum of its proper divisors (1).

720605597 is an equidigital number, since it uses as much as digits as its factorization.

720605597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 720605597 is about 26844.0979919237. The cubic root of 720605597 is about 896.5321682675.

The spelling of 720605597 in words is "seven hundred twenty million, six hundred five thousand, five hundred ninety-seven".