394705403 has 4 divisors (see below), whose sum is σ = 396206448. Its totient is φ = 393204360.

The previous prime is 394705391. The next prime is 394705427. The reversal of 394705403 is 304507493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 394705403 - 2⁸ = 394705147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394705453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750128 + ... + 750653.

It is an arithmetic number, because the mean of its divisors is an integer number (99051612).

Almost surely, 2^394705403 is an apocalyptic number.

394705403 is a deficient number, since it is larger than the sum of its proper divisors (1501045).

394705403 is a wasteful number, since it uses less digits than its factorization.

394705403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501044.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 394705403 is about 19867.1941400893. The cubic root of 394705403 is about 733.5409394078.

The spelling of 394705403 in words is "three hundred ninety-four million, seven hundred five thousand, four hundred three".