720703121170397 has 2 divisors, whose sum is σ = 720703121170398. Its totient is φ = 720703121170396.

The previous prime is 720703121170189. The next prime is 720703121170399. The reversal of 720703121170397 is 793071121307027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700196904802756 + 20506216367641 = 26461234^2 + 4528379^2 .

It is a cyclic number.

It is not a de Polignac number, because 720703121170397 - 2¹⁰ = 720703121169373 is a prime.

Together with 720703121170399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720703121170399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360351560585198 + 360351560585199.

It is an arithmetic number, because the mean of its divisors is an integer number (360351560585199).

Almost surely, 2^{720703121170397} is an apocalyptic number.

It is an amenable number.

720703121170397 is a deficient number, since it is larger than the sum of its proper divisors (1).

720703121170397 is an equidigital number, since it uses as much as digits as its factorization.

720703121170397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777924, while the sum is 50.

The spelling of 720703121170397 in words is "seven hundred twenty trillion, seven hundred three billion, one hundred twenty-one million, one hundred seventy thousand, three hundred ninety-seven".