397809705443 has 2 divisors, whose sum is σ = 397809705444. Its totient is φ = 397809705442.

The previous prime is 397809705413. The next prime is 397809705467. The reversal of 397809705443 is 344507908793.

It is a strong prime.

It is an emirp because it is prime and its reverse (344507908793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397809705443 - 2¹⁶ = 397809639907 is a prime.

It is not a weakly prime, because it can be changed into another prime (397809705413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198904852721 + 198904852722.

It is an arithmetic number, because the mean of its divisors is an integer number (198904852722).

Almost surely, 2^397809705443 is an apocalyptic number.

397809705443 is a deficient number, since it is larger than the sum of its proper divisors (1).

397809705443 is an equidigital number, since it uses as much as digits as its factorization.

397809705443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22861440, while the sum is 59.

The spelling of 397809705443 in words is "three hundred ninety-seven billion, eight hundred nine million, seven hundred five thousand, four hundred forty-three".