797468821 has 2 divisors, whose sum is σ = 797468822. Its totient is φ = 797468820.

The previous prime is 797468809. The next prime is 797468851. The reversal of 797468821 is 128864797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 769230225 + 28238596 = 27735^2 + 5314^2 .

It is an emirp because it is prime and its reverse (128864797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 797468821 - 2¹⁵ = 797436053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797468851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398734410 + 398734411.

It is an arithmetic number, because the mean of its divisors is an integer number (398734411).

Almost surely, 2^797468821 is an apocalyptic number.

It is an amenable number.

797468821 is a deficient number, since it is larger than the sum of its proper divisors (1).

797468821 is an equidigital number, since it uses as much as digits as its factorization.

797468821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 52.

The square root of 797468821 is about 28239.4904522019. The cubic root of 797468821 is about 927.3376746509.

The spelling of 797468821 in words is "seven hundred ninety-seven million, four hundred sixty-eight thousand, eight hundred twenty-one".