391794873 has 8 divisors (see below), whose sum is σ = 526507008. Its totient is φ = 259139664.

The previous prime is 391794863. The next prime is 391794881. The reversal of 391794873 is 378497193.

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

It is not a de Polignac number, because 391794873 - 2¹⁶ = 391729337 is a prime.

It is a super-2 number, since 2×391794873² = 307006445018172258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (391794803) 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, 513786 + ... + 514547.

It is an arithmetic number, because the mean of its divisors is an integer number (65813376).

Almost surely, 2^391794873 is an apocalyptic number.

It is an amenable number.

391794873 is a deficient number, since it is larger than the sum of its proper divisors (134712135).

391794873 is a wasteful number, since it uses less digits than its factorization.

391794873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028463.

The product of its digits is 1143072, while the sum is 51.

The square root of 391794873 is about 19793.8089563378. The cubic root of 391794873 is about 731.7334628601.

It can be divided in two parts, 3917 and 94873, that added together give a triangular number (98790 = T₄₄₄).

The spelling of 391794873 in words is "three hundred ninety-one million, seven hundred ninety-four thousand, eight hundred seventy-three".