394820449 has 2 divisors, whose sum is σ = 394820450. Its totient is φ = 394820448.

The previous prime is 394820443. The next prime is 394820467. The reversal of 394820449 is 944028493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387893025 + 6927424 = 19695^2 + 2632^2 .

It is a cyclic number.

It is not a de Polignac number, because 394820449 - 2¹⁷ = 394689377 is a prime.

It is not a weakly prime, because it can be changed into another prime (394820443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197410224 + 197410225.

It is an arithmetic number, because the mean of its divisors is an integer number (197410225).

Almost surely, 2^394820449 is an apocalyptic number.

It is an amenable number.

394820449 is a deficient number, since it is larger than the sum of its proper divisors (1).

394820449 is an equidigital number, since it uses as much as digits as its factorization.

394820449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 394820449 is about 19870.0893052850. The cubic root of 394820449 is about 733.6122016305.

The spelling of 394820449 in words is "three hundred ninety-four million, eight hundred twenty thousand, four hundred forty-nine".