797586857 has 2 divisors, whose sum is σ = 797586858. Its totient is φ = 797586856.

The previous prime is 797586821. The next prime is 797586859. The reversal of 797586857 is 758685797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648160681 + 149426176 = 25459^2 + 12224^2 .

It is a cyclic number.

It is not a de Polignac number, because 797586857 - 2¹⁶ = 797521321 is a prime.

It is a super-2 number, since 2×797586857² = 1272289588918276898, which contains 22 as substring.

Together with 797586859, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 797586857.

It is not a weakly prime, because it can be changed into another prime (797586859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398793428 + 398793429.

It is an arithmetic number, because the mean of its divisors is an integer number (398793429).

Almost surely, 2^797586857 is an apocalyptic number.

It is an amenable number.

797586857 is a deficient number, since it is larger than the sum of its proper divisors (1).

797586857 is an equidigital number, since it uses as much as digits as its factorization.

797586857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29635200, while the sum is 62.

The square root of 797586857 is about 28241.5802851044. The cubic root of 797586857 is about 927.3834251667.

The spelling of 797586857 in words is "seven hundred ninety-seven million, five hundred eighty-six thousand, eight hundred fifty-seven".