397849824397 has 2 divisors, whose sum is σ = 397849824398. Its totient is φ = 397849824396.

The previous prime is 397849824377. The next prime is 397849824439. The reversal of 397849824397 is 793428948793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210143395396 + 187706429001 = 458414^2 + 433251^2 .

It is a cyclic number.

It is not a de Polignac number, because 397849824397 - 2¹⁹ = 397849300109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397849824347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198924912198 + 198924912199.

It is an arithmetic number, because the mean of its divisors is an integer number (198924912199).

Almost surely, 2^397849824397 is an apocalyptic number.

It is an amenable number.

397849824397 is a deficient number, since it is larger than the sum of its proper divisors (1).

397849824397 is an equidigital number, since it uses as much as digits as its factorization.

397849824397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 658409472, while the sum is 73.

The spelling of 397849824397 in words is "three hundred ninety-seven billion, eight hundred forty-nine million, eight hundred twenty-four thousand, three hundred ninety-seven".