394315793 has 4 divisors (see below), whose sum is σ = 394441140. Its totient is φ = 394190448.

The previous prime is 394315783. The next prime is 394315829. The reversal of 394315793 is 397513493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 397513493 = 13 ⋅30577961.

It can be written as a sum of positive squares in 2 ways, for example, as 255264529 + 139051264 = 15977^2 + 11792^2 .

It is a cyclic number.

It is not a de Polignac number, because 394315793 - 2¹⁶ = 394250257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (394315783) 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, 57830 + ... + 64287.

It is an arithmetic number, because the mean of its divisors is an integer number (98610285).

Almost surely, 2^394315793 is an apocalyptic number.

It is an amenable number.

394315793 is a deficient number, since it is larger than the sum of its proper divisors (125347).

394315793 is a wasteful number, since it uses less digits than its factorization.

394315793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125346.

The product of its digits is 306180, while the sum is 44.

The square root of 394315793 is about 19857.3863587331. The cubic root of 394315793 is about 733.2995028241.

The spelling of 394315793 in words is "three hundred ninety-four million, three hundred fifteen thousand, seven hundred ninety-three".