391684473 has 12 divisors (see below), whose sum is σ = 584017408. Its totient is φ = 252699480.

The previous prime is 391684453. The next prime is 391684483. The reversal of 391684473 is 374486193.

It is not a de Polignac number, because 391684473 - 2⁶ = 391684409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391684453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 701665 + ... + 702222.

Almost surely, 2^391684473 is an apocalyptic number.

It is an amenable number.

391684473 is a deficient number, since it is larger than the sum of its proper divisors (192332935).

391684473 is a wasteful number, since it uses less digits than its factorization.

391684473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403924 (or 1403921 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 391684473 is about 19791.0200090849. The cubic root of 391684473 is about 731.6647270932.

The spelling of 391684473 in words is "three hundred ninety-one million, six hundred eighty-four thousand, four hundred seventy-three".