8487391 has 8 divisors (see below), whose sum is σ = 9661824. Its totient is φ = 7380120.

The previous prime is 8487389. The next prime is 8487419. The reversal of 8487391 is 1937848.

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

It is not a de Polignac number, because 8487391 - 2¹ = 8487389 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8487341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16521 + ... + 17026.

It is an arithmetic number, because the mean of its divisors is an integer number (1207728).

Almost surely, 2^8487391 is an apocalyptic number.

8487391 is a deficient number, since it is larger than the sum of its proper divisors (1174433).

8487391 is a wasteful number, since it uses less digits than its factorization.

8487391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33581.

The product of its digits is 48384, while the sum is 40.

The square root of 8487391 is about 2913.3127192253. The cubic root of 8487391 is about 203.9817922363.

The spelling of 8487391 in words is "eight million, four hundred eighty-seven thousand, three hundred ninety-one".