394729633 has 2 divisors, whose sum is σ = 394729634. Its totient is φ = 394729632.

The previous prime is 394729631. The next prime is 394729651. The reversal of 394729633 is 336927493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393149584 + 1580049 = 19828^2 + 1257^2 .

It is a cyclic number.

It is not a de Polignac number, because 394729633 - 2¹ = 394729631 is a prime.

It is a super-2 number, since 2×394729633² = 311622966336629378, which contains 22 as substring.

Together with 394729631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (394729631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197364816 + 197364817.

It is an arithmetic number, because the mean of its divisors is an integer number (197364817).

Almost surely, 2^394729633 is an apocalyptic number.

It is an amenable number.

394729633 is a deficient number, since it is larger than the sum of its proper divisors (1).

394729633 is an equidigital number, since it uses as much as digits as its factorization.

394729633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 46.

The square root of 394729633 is about 19867.8039299768. The cubic root of 394729633 is about 733.5559491958. Note that the first 3 decimals are identical.

The spelling of 394729633 in words is "three hundred ninety-four million, seven hundred twenty-nine thousand, six hundred thirty-three".