6315987 has 4 divisors (see below), whose sum is σ = 8421320. Its totient is φ = 4210656.

The previous prime is 6315983. The next prime is 6315989. The reversal of 6315987 is 7895136.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6315987 - 2² = 6315983 is a prime.

It is a D-number.

It is a Duffinian number.

6315987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6315983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052662 + ... + 1052667.

It is an arithmetic number, because the mean of its divisors is an integer number (2105330).

Almost surely, 2^6315987 is an apocalyptic number.

6315987 is a deficient number, since it is larger than the sum of its proper divisors (2105333).

6315987 is a wasteful number, since it uses less digits than its factorization.

6315987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105332.

The product of its digits is 45360, while the sum is 39.

The square root of 6315987 is about 2513.1627484109. The cubic root of 6315987 is about 184.8475686188.

The spelling of 6315987 in words is "six million, three hundred fifteen thousand, nine hundred eighty-seven".