393721368097 has 2 divisors, whose sum is σ = 393721368098. Its totient is φ = 393721368096.

The previous prime is 393721368091. The next prime is 393721368121. The reversal of 393721368097 is 790863127393.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271332642816 + 122388725281 = 520896^2 + 349841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393721368097 is a prime.

It is not a weakly prime, because it can be changed into another prime (393721368091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196860684048 + 196860684049.

It is an arithmetic number, because the mean of its divisors is an integer number (196860684049).

Almost surely, 2^393721368097 is an apocalyptic number.

It is an amenable number.

393721368097 is a deficient number, since it is larger than the sum of its proper divisors (1).

393721368097 is an equidigital number, since it uses as much as digits as its factorization.

393721368097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10287648, while the sum is 58.

The spelling of 393721368097 in words is "three hundred ninety-three billion, seven hundred twenty-one million, three hundred sixty-eight thousand, ninety-seven".