397748509211 has 2 divisors, whose sum is σ = 397748509212. Its totient is φ = 397748509210.

The previous prime is 397748509187. The next prime is 397748509229. The reversal of 397748509211 is 112905847793.

It is a strong prime.

It is an emirp because it is prime and its reverse (112905847793) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397748509211 is a prime.

It is not a weakly prime, because it can be changed into another prime (397748509271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198874254605 + 198874254606.

It is an arithmetic number, because the mean of its divisors is an integer number (198874254606).

Almost surely, 2^397748509211 is an apocalyptic number.

397748509211 is a deficient number, since it is larger than the sum of its proper divisors (1).

397748509211 is an equidigital number, since it uses as much as digits as its factorization.

397748509211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 397748509211 in words is "three hundred ninety-seven billion, seven hundred forty-eight million, five hundred nine thousand, two hundred eleven".