797274818321 has 2 divisors, whose sum is σ = 797274818322. Its totient is φ = 797274818320.

The previous prime is 797274818309. The next prime is 797274818323. The reversal of 797274818321 is 123818472797.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 545382250000 + 251892568321 = 738500^2 + 501889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-797274818321 is a prime.

Together with 797274818323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (797274818323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398637409160 + 398637409161.

It is an arithmetic number, because the mean of its divisors is an integer number (398637409161).

Almost surely, 2^797274818321 is an apocalyptic number.

It is an amenable number.

797274818321 is a deficient number, since it is larger than the sum of its proper divisors (1).

797274818321 is an equidigital number, since it uses as much as digits as its factorization.

797274818321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9483264, while the sum is 59.

The spelling of 797274818321 in words is "seven hundred ninety-seven billion, two hundred seventy-four million, eight hundred eighteen thousand, three hundred twenty-one".