394704678943 has 2 divisors, whose sum is σ = 394704678944. Its totient is φ = 394704678942.

The previous prime is 394704678923. The next prime is 394704679037. The reversal of 394704678943 is 349876407493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394704678943 - 2¹³ = 394704670751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394704678923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197352339471 + 197352339472.

It is an arithmetic number, because the mean of its divisors is an integer number (197352339472).

Almost surely, 2^394704678943 is an apocalyptic number.

394704678943 is a deficient number, since it is larger than the sum of its proper divisors (1).

394704678943 is an equidigital number, since it uses as much as digits as its factorization.

394704678943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109734912, while the sum is 64.

The spelling of 394704678943 in words is "three hundred ninety-four billion, seven hundred four million, six hundred seventy-eight thousand, nine hundred forty-three".