393813047 has 8 divisors (see below), whose sum is σ = 404243136. Its totient is φ = 383468512.

The previous prime is 393813031. The next prime is 393813059. The reversal of 393813047 is 740318393.

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 393813047 - 2⁴ = 393813031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 393813047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393813547) 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, 12008 + ... + 30525.

It is an arithmetic number, because the mean of its divisors is an integer number (50530392).

Almost surely, 2^393813047 is an apocalyptic number.

393813047 is a deficient number, since it is larger than the sum of its proper divisors (10430089).

393813047 is a wasteful number, since it uses less digits than its factorization.

393813047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42777.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 393813047 is about 19844.7234044720. The cubic root of 393813047 is about 732.9877221064.

The spelling of 393813047 in words is "three hundred ninety-three million, eight hundred thirteen thousand, forty-seven".