394799129 has 2 divisors, whose sum is σ = 394799130. Its totient is φ = 394799128.

The previous prime is 394799113. The next prime is 394799147. The reversal of 394799129 is 921997493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394101904 + 697225 = 19852^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 394799129 - 2⁴ = 394799113 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (394799179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197399564 + 197399565.

It is an arithmetic number, because the mean of its divisors is an integer number (197399565).

Almost surely, 2^394799129 is an apocalyptic number.

It is an amenable number.

394799129 is a deficient number, since it is larger than the sum of its proper divisors (1).

394799129 is an equidigital number, since it uses as much as digits as its factorization.

394799129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 53.

The square root of 394799129 is about 19869.5528132870. The cubic root of 394799129 is about 733.5989965616.

The spelling of 394799129 in words is "three hundred ninety-four million, seven hundred ninety-nine thousand, one hundred twenty-nine".