397801066828247 has 2 divisors, whose sum is σ = 397801066828248. Its totient is φ = 397801066828246.

The previous prime is 397801066828219. The next prime is 397801066828303. The reversal of 397801066828247 is 742828660108793.

It is a weak prime.

It is an emirp because it is prime and its reverse (742828660108793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397801066828247 - 2¹⁸ = 397801066566103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397801066128247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198900533414123 + 198900533414124.

It is an arithmetic number, because the mean of its divisors is an integer number (198900533414124).

Almost surely, 2^{397801066828247} is an apocalyptic number.

397801066828247 is a deficient number, since it is larger than the sum of its proper divisors (1).

397801066828247 is an equidigital number, since it uses as much as digits as its factorization.

397801066828247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 390168576, while the sum is 71.

The spelling of 397801066828247 in words is "three hundred ninety-seven trillion, eight hundred one billion, sixty-six million, eight hundred twenty-eight thousand, two hundred forty-seven".