394624847 has 2 divisors, whose sum is σ = 394624848. Its totient is φ = 394624846.

The previous prime is 394624819. The next prime is 394624891. The reversal of 394624847 is 748426493.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394624847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394624897) 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, 197312423 + 197312424.

It is an arithmetic number, because the mean of its divisors is an integer number (197312424).

Almost surely, 2^394624847 is an apocalyptic number.

394624847 is a deficient number, since it is larger than the sum of its proper divisors (1).

394624847 is an equidigital number, since it uses as much as digits as its factorization.

394624847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 47.

The square root of 394624847 is about 19865.1666743574. The cubic root of 394624847 is about 733.4910328666.

The spelling of 394624847 in words is "three hundred ninety-four million, six hundred twenty-four thousand, eight hundred forty-seven".