397518216519407 has 2 divisors, whose sum is σ = 397518216519408. Its totient is φ = 397518216519406.

The previous prime is 397518216519353. The next prime is 397518216519433. The reversal of 397518216519407 is 704915612815793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397518216519407 - 2²⁸ = 397517948083951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397518216519007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198759108259703 + 198759108259704.

It is an arithmetic number, because the mean of its divisors is an integer number (198759108259704).

It is a 1-persistent number, because it is pandigital, but 2⋅397518216519407 = 795036433038814 is not.

Almost surely, 2^{397518216519407} is an apocalyptic number.

397518216519407 is a deficient number, since it is larger than the sum of its proper divisors (1).

397518216519407 is an equidigital number, since it uses as much as digits as its factorization.

397518216519407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 114307200, while the sum is 68.

The spelling of 397518216519407 in words is "three hundred ninety-seven trillion, five hundred eighteen billion, two hundred sixteen million, five hundred nineteen thousand, four hundred seven".