394687426903 has 24 divisors (see below), whose sum is σ = 500937588864. Its totient is φ = 307504033200.

The previous prime is 394687426811. The next prime is 394687426909. The reversal of 394687426903 is 309624786493.

It is not a de Polignac number, because 394687426903 - 2³³ = 386097492311 is a prime.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394687426909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3945126 + ... + 4043932.

It is an arithmetic number, because the mean of its divisors is an integer number (20872399536).

Almost surely, 2^394687426903 is an apocalyptic number.

394687426903 is a deficient number, since it is larger than the sum of its proper divisors (106250161961).

394687426903 is a wasteful number, since it uses less digits than its factorization.

394687426903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106243 (or 106236 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 61.

The spelling of 394687426903 in words is "three hundred ninety-four billion, six hundred eighty-seven million, four hundred twenty-six thousand, nine hundred three".