397033978893569 has 2 divisors, whose sum is σ = 397033978893570. Its totient is φ = 397033978893568.

The previous prime is 397033978893481. The next prime is 397033978893631. The reversal of 397033978893569 is 965398879330793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270144725766400 + 126889253127169 = 16436080^2 + 11264513^2 .

It is an emirp because it is prime and its reverse (965398879330793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397033978893569 - 2²⁴ = 397033962116353 is a prime.

It is a super-2 number, since 2×397033978893569² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (397033978890569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198516989446784 + 198516989446785.

It is an arithmetic number, because the mean of its divisors is an integer number (198516989446785).

Almost surely, 2^{397033978893569} is an apocalyptic number.

It is an amenable number.

397033978893569 is a deficient number, since it is larger than the sum of its proper divisors (1).

397033978893569 is an equidigital number, since it uses as much as digits as its factorization.

397033978893569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49997969280, while the sum is 89.

The spelling of 397033978893569 in words is "three hundred ninety-seven trillion, thirty-three billion, nine hundred seventy-eight million, eight hundred ninety-three thousand, five hundred sixty-nine".