720538297 has 2 divisors, whose sum is σ = 720538298. Its totient is φ = 720538296.

The previous prime is 720538279. The next prime is 720538309. The reversal of 720538297 is 792835027.

Together with previous prime (720538279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620458281 + 100080016 = 24909^2 + 10004^2 .

It is a cyclic number.

It is not a de Polignac number, because 720538297 - 2¹⁵ = 720505529 is a prime.

It is not a weakly prime, because it can be changed into another prime (720538997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360269148 + 360269149.

It is an arithmetic number, because the mean of its divisors is an integer number (360269149).

Almost surely, 2^720538297 is an apocalyptic number.

It is an amenable number.

720538297 is a deficient number, since it is larger than the sum of its proper divisors (1).

720538297 is an equidigital number, since it uses as much as digits as its factorization.

720538297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 720538297 is about 26842.8444282643. The cubic root of 720538297 is about 896.5042572559.

The spelling of 720538297 in words is "seven hundred twenty million, five hundred thirty-eight thousand, two hundred ninety-seven".