397199288609 has 2 divisors, whose sum is σ = 397199288610. Its totient is φ = 397199288608.

The previous prime is 397199288579. The next prime is 397199288617. The reversal of 397199288609 is 906882991793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323783760400 + 73415528209 = 569020^2 + 270953^2 .

It is a cyclic number.

It is not a de Polignac number, because 397199288609 - 2¹² = 397199284513 is a prime.

It is not a weakly prime, because it can be changed into another prime (397199288669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198599644304 + 198599644305.

It is an arithmetic number, because the mean of its divisors is an integer number (198599644305).

Almost surely, 2^397199288609 is an apocalyptic number.

It is an amenable number.

397199288609 is a deficient number, since it is larger than the sum of its proper divisors (1).

397199288609 is an equidigital number, since it uses as much as digits as its factorization.

397199288609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105815808, while the sum is 71.

The spelling of 397199288609 in words is "three hundred ninety-seven billion, one hundred ninety-nine million, two hundred eighty-eight thousand, six hundred nine".