396775387 has 2 divisors, whose sum is σ = 396775388. Its totient is φ = 396775386.

The previous prime is 396775381. The next prime is 396775391. The reversal of 396775387 is 783577693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 396775387 - 2⁷ = 396775259 is a prime.

It is not a weakly prime, because it can be changed into another prime (396775381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198387693 + 198387694.

It is an arithmetic number, because the mean of its divisors is an integer number (198387694).

Almost surely, 2^396775387 is an apocalyptic number.

396775387 is a deficient number, since it is larger than the sum of its proper divisors (1).

396775387 is an equidigital number, since it uses as much as digits as its factorization.

396775387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6667920, while the sum is 55.

The square root of 396775387 is about 19919.2215460344. The cubic root of 396775387 is about 734.8210260391.

The spelling of 396775387 in words is "three hundred ninety-six million, seven hundred seventy-five thousand, three hundred eighty-seven".