394782673 has 2 divisors, whose sum is σ = 394782674. Its totient is φ = 394782672.

The previous prime is 394782617. The next prime is 394782677. The reversal of 394782673 is 376287493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367565584 + 27217089 = 19172^2 + 5217^2 .

It is an emirp because it is prime and its reverse (376287493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394782673 - 2¹³ = 394774481 is a prime.

It is not a weakly prime, because it can be changed into another prime (394782677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197391336 + 197391337.

It is an arithmetic number, because the mean of its divisors is an integer number (197391337).

Almost surely, 2^394782673 is an apocalyptic number.

It is an amenable number.

394782673 is a deficient number, since it is larger than the sum of its proper divisors (1).

394782673 is an equidigital number, since it uses as much as digits as its factorization.

394782673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 49.

The square root of 394782673 is about 19869.1387080568. The cubic root of 394782673 is about 733.5888038062.

The spelling of 394782673 in words is "three hundred ninety-four million, seven hundred eighty-two thousand, six hundred seventy-three".