394576849 has 2 divisors, whose sum is σ = 394576850. Its totient is φ = 394576848.

The previous prime is 394576759. The next prime is 394576867. The reversal of 394576849 is 948675493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259854400 + 134722449 = 16120^2 + 11607^2 .

It is an emirp because it is prime and its reverse (948675493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394576849 - 2¹¹ = 394574801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394576849.

It is not a weakly prime, because it can be changed into another prime (394576549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197288424 + 197288425.

It is an arithmetic number, because the mean of its divisors is an integer number (197288425).

Almost surely, 2^394576849 is an apocalyptic number.

It is an amenable number.

394576849 is a deficient number, since it is larger than the sum of its proper divisors (1).

394576849 is an equidigital number, since it uses as much as digits as its factorization.

394576849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The square root of 394576849 is about 19863.9585430498. The cubic root of 394576849 is about 733.4612936257.

The spelling of 394576849 in words is "three hundred ninety-four million, five hundred seventy-six thousand, eight hundred forty-nine".