396785317 has 2 divisors, whose sum is σ = 396785318. Its totient is φ = 396785316.

The previous prime is 396785281. The next prime is 396785357. The reversal of 396785317 is 713587693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273108676 + 123676641 = 16526^2 + 11121^2 .

It is a cyclic number.

It is not a de Polignac number, because 396785317 - 2¹⁹ = 396261029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396785357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198392658 + 198392659.

It is an arithmetic number, because the mean of its divisors is an integer number (198392659).

Almost surely, 2^396785317 is an apocalyptic number.

It is an amenable number.

396785317 is a deficient number, since it is larger than the sum of its proper divisors (1).

396785317 is an equidigital number, since it uses as much as digits as its factorization.

396785317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 49.

The square root of 396785317 is about 19919.4708012035. The cubic root of 396785317 is about 734.8271560496.

The spelling of 396785317 in words is "three hundred ninety-six million, seven hundred eighty-five thousand, three hundred seventeen".