394606377403 has 4 divisors (see below), whose sum is σ = 450978717040. Its totient is φ = 338234037768.

The previous prime is 394606377359. The next prime is 394606377409. The reversal of 394606377403 is 304773606493.

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: 304773606493 = 47 ⋅6484544819.

It is a cyclic number.

It is not a de Polignac number, because 394606377403 - 2²⁵ = 394572822971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394606377409) 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, 28186169808 + ... + 28186169821.

It is an arithmetic number, because the mean of its divisors is an integer number (112744679260).

Almost surely, 2^394606377403 is an apocalyptic number.

394606377403 is a deficient number, since it is larger than the sum of its proper divisors (56372339637).

394606377403 is an equidigital number, since it uses as much as digits as its factorization.

394606377403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56372339636.

The product of its (nonzero) digits is 6858432, while the sum is 52.

The spelling of 394606377403 in words is "three hundred ninety-four billion, six hundred six million, three hundred seventy-seven thousand, four hundred three".