391669473 has 8 divisors (see below), whose sum is σ = 562397248. Its totient is φ = 241027344.

The previous prime is 391669459. The next prime is 391669483. The reversal of 391669473 is 374966193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 391669473 - 2⁸ = 391669217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (391669423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5021365 + ... + 5021442.

It is an arithmetic number, because the mean of its divisors is an integer number (70299656).

Almost surely, 2^391669473 is an apocalyptic number.

It is an amenable number.

391669473 is a deficient number, since it is larger than the sum of its proper divisors (170727775).

391669473 is a wasteful number, since it uses less digits than its factorization.

391669473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10042823.

The product of its digits is 734832, while the sum is 48.

The square root of 391669473 is about 19790.6410457064. The cubic root of 391669473 is about 731.6553869978.

The spelling of 391669473 in words is "three hundred ninety-one million, six hundred sixty-nine thousand, four hundred seventy-three".