394436071 has 2 divisors, whose sum is σ = 394436072. Its totient is φ = 394436070.

The previous prime is 394436051. The next prime is 394436087. The reversal of 394436071 is 170634493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394436071 - 2¹³ = 394427879 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 394436071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394436041) 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, 197218035 + 197218036.

It is an arithmetic number, because the mean of its divisors is an integer number (197218036).

Almost surely, 2^394436071 is an apocalyptic number.

394436071 is a deficient number, since it is larger than the sum of its proper divisors (1).

394436071 is an equidigital number, since it uses as much as digits as its factorization.

394436071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 394436071 is about 19860.4146734151. The cubic root of 394436071 is about 733.3740546028.

The spelling of 394436071 in words is "three hundred ninety-four million, four hundred thirty-six thousand, seventy-one".