394609647 has 8 divisors (see below), whose sum is σ = 526258944. Its totient is φ = 263016728.

The previous prime is 394609577. The next prime is 394609679. The reversal of 394609647 is 746906493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394609647 - 2¹⁰ = 394608623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 394609596 and 394609605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394609547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6568 + ... + 28850.

It is an arithmetic number, because the mean of its divisors is an integer number (65782368).

Almost surely, 2^394609647 is an apocalyptic number.

394609647 is a deficient number, since it is larger than the sum of its proper divisors (131649297).

394609647 is a wasteful number, since it uses less digits than its factorization.

394609647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28189.

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 394609647 is about 19864.7840914519. The cubic root of 394609647 is about 733.4816153088.

The spelling of 394609647 in words is "three hundred ninety-four million, six hundred nine thousand, six hundred forty-seven".