396991985333 has 2 divisors, whose sum is σ = 396991985334. Its totient is φ = 396991985332.

The previous prime is 396991985321. The next prime is 396991985347. The reversal of 396991985333 is 333589199693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396991985329 + 4 = 630073^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 396991985333 - 2¹⁴ = 396991968949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396991987333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198495992666 + 198495992667.

It is an arithmetic number, because the mean of its divisors is an integer number (198495992667).

Almost surely, 2^396991985333 is an apocalyptic number.

It is an amenable number.

396991985333 is a deficient number, since it is larger than the sum of its proper divisors (1).

396991985333 is an equidigital number, since it uses as much as digits as its factorization.

396991985333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127545840, while the sum is 68.

The spelling of 396991985333 in words is "three hundred ninety-six billion, nine hundred ninety-one million, nine hundred eighty-five thousand, three hundred thirty-three".