394085903 has 4 divisors (see below), whose sum is σ = 397701480. Its totient is φ = 390470328.

The previous prime is 394085831. The next prime is 394085911. The reversal of 394085903 is 309580493.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394085903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394085303) 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 3 ways as a sum of consecutive naturals, for example, 1807625 + ... + 1807842.

It is an arithmetic number, because the mean of its divisors is an integer number (99425370).

Almost surely, 2^394085903 is an apocalyptic number.

394085903 is a deficient number, since it is larger than the sum of its proper divisors (3615577).

394085903 is a wasteful number, since it uses less digits than its factorization.

394085903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615576.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 394085903 is about 19851.5969886556. The cubic root of 394085903 is about 733.1569681710.

The spelling of 394085903 in words is "three hundred ninety-four million, eighty-five thousand, nine hundred three".