394780333 has 2 divisors, whose sum is σ = 394780334. Its totient is φ = 394780332.

The previous prime is 394780283. The next prime is 394780363. The reversal of 394780333 is 333087493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393704964 + 1075369 = 19842^2 + 1037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394780333 is a prime.

It is a super-2 number, since 2×394780333² = 311703022647181778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394780363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197390166 + 197390167.

It is an arithmetic number, because the mean of its divisors is an integer number (197390167).

Almost surely, 2^394780333 is an apocalyptic number.

It is an amenable number.

394780333 is a deficient number, since it is larger than the sum of its proper divisors (1).

394780333 is an equidigital number, since it uses as much as digits as its factorization.

394780333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 394780333 is about 19869.0798226793. The cubic root of 394780333 is about 733.5873544002.

The spelling of 394780333 in words is "three hundred ninety-four million, seven hundred eighty thousand, three hundred thirty-three".