396191947 has 2 divisors, whose sum is σ = 396191948. Its totient is φ = 396191946.

The previous prime is 396191927. The next prime is 396191959. The reversal of 396191947 is 749191693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 396191947 - 2¹⁹ = 395667659 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 396191947.

It is not a weakly prime, because it can be changed into another prime (396191927) 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, 198095973 + 198095974.

It is an arithmetic number, because the mean of its divisors is an integer number (198095974).

Almost surely, 2^396191947 is an apocalyptic number.

396191947 is a deficient number, since it is larger than the sum of its proper divisors (1).

396191947 is an equidigital number, since it uses as much as digits as its factorization.

396191947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 49.

The square root of 396191947 is about 19904.5710076856. The cubic root of 396191947 is about 734.4606758217.

The spelling of 396191947 in words is "three hundred ninety-six million, one hundred ninety-one thousand, nine hundred forty-seven".