8391473 has 4 divisors (see below), whose sum is σ = 8397888. Its totient is φ = 8385060.

The previous prime is 8391463. The next prime is 8391479. The reversal of 8391473 is 3741938.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8391473 - 2⁴ = 8391457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8391479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461 + ... + 4122.

It is an arithmetic number, because the mean of its divisors is an integer number (2099472).

Almost surely, 2^8391473 is an apocalyptic number.

It is an amenable number.

8391473 is a deficient number, since it is larger than the sum of its proper divisors (6415).

8391473 is a wasteful number, since it uses less digits than its factorization.

8391473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6414.

The product of its digits is 18144, while the sum is 35.

The square root of 8391473 is about 2896.8039284701. The cubic root of 8391473 is about 203.2104638550.

The spelling of 8391473 in words is "eight million, three hundred ninety-one thousand, four hundred seventy-three".