797724227257 has 2 divisors, whose sum is σ = 797724227258. Its totient is φ = 797724227256.

The previous prime is 797724227207. The next prime is 797724227329. The reversal of 797724227257 is 752722427797.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 787729026681 + 9995200576 = 887541^2 + 99976^2 .

It is an emirp because it is prime and its reverse (752722427797) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-797724227257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 797724227195 and 797724227204.

It is not a weakly prime, because it can be changed into another prime (797724227207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398862113628 + 398862113629.

It is an arithmetic number, because the mean of its divisors is an integer number (398862113629).

Almost surely, 2^797724227257 is an apocalyptic number.

It is an amenable number.

797724227257 is a deficient number, since it is larger than the sum of its proper divisors (1).

797724227257 is an equidigital number, since it uses as much as digits as its factorization.

797724227257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48404160, while the sum is 61.

The spelling of 797724227257 in words is "seven hundred ninety-seven billion, seven hundred twenty-four million, two hundred twenty-seven thousand, two hundred fifty-seven".