399334193393 has 2 divisors, whose sum is σ = 399334193394. Its totient is φ = 399334193392.

The previous prime is 399334193333. The next prime is 399334193437. The reversal of 399334193393 is 393391433993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299852617744 + 99481575649 = 547588^2 + 315407^2 .

It is a cyclic number.

It is not a de Polignac number, because 399334193393 - 2¹² = 399334189297 is a prime.

It is not a weakly prime, because it can be changed into another prime (399334193333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199667096696 + 199667096697.

It is an arithmetic number, because the mean of its divisors is an integer number (199667096697).

Almost surely, 2^399334193393 is an apocalyptic number.

It is an amenable number.

399334193393 is a deficient number, since it is larger than the sum of its proper divisors (1).

399334193393 is an equidigital number, since it uses as much as digits as its factorization.

399334193393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19131876, while the sum is 59.

The spelling of 399334193393 in words is "three hundred ninety-nine billion, three hundred thirty-four million, one hundred ninety-three thousand, three hundred ninety-three".