394904747 has 4 divisors (see below), whose sum is σ = 418134456. Its totient is φ = 371675040.

The previous prime is 394904701. The next prime is 394904761. The reversal of 394904747 is 747409493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747409493 = 3541 ⋅211073.

It is a cyclic number.

It is not a de Polignac number, because 394904747 - 2¹⁸ = 394642603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394901747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11614829 + ... + 11614862.

It is an arithmetic number, because the mean of its divisors is an integer number (104533614).

Almost surely, 2^394904747 is an apocalyptic number.

394904747 is a deficient number, since it is larger than the sum of its proper divisors (23229709).

394904747 is a wasteful number, since it uses less digits than its factorization.

394904747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23229708.

The product of its (nonzero) digits is 762048, while the sum is 47.

The square root of 394904747 is about 19872.2104205848. The cubic root of 394904747 is about 733.6644090248.

The spelling of 394904747 in words is "three hundred ninety-four million, nine hundred four thousand, seven hundred forty-seven".