397748509297 has 2 divisors, whose sum is σ = 397748509298. Its totient is φ = 397748509296.

The previous prime is 397748509283. The next prime is 397748509357. The reversal of 397748509297 is 792905847793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271070174736 + 126678334561 = 520644^2 + 355919^2 .

It is a cyclic number.

It is not a de Polignac number, because 397748509297 - 2³¹ = 395601025649 is a prime.

It is not a weakly prime, because it can be changed into another prime (397748509247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198874254648 + 198874254649.

It is an arithmetic number, because the mean of its divisors is an integer number (198874254649).

Almost surely, 2^397748509297 is an apocalyptic number.

It is an amenable number.

397748509297 is a deficient number, since it is larger than the sum of its proper divisors (1).

397748509297 is an equidigital number, since it uses as much as digits as its factorization.

397748509297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240045120, while the sum is 70.

The spelling of 397748509297 in words is "three hundred ninety-seven billion, seven hundred forty-eight million, five hundred nine thousand, two hundred ninety-seven".