7987318 has 4 divisors (see below), whose sum is σ = 11980980. Its totient is φ = 3993658.

The previous prime is 7987313. The next prime is 7987319. The reversal of 7987318 is 8137897.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7987313) 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 as a sum of consecutive naturals, namely, 1996828 + ... + 1996831.

It is an arithmetic number, because the mean of its divisors is an integer number (2995245).

Almost surely, 2^7987318 is an apocalyptic number.

7987318 is a deficient number, since it is larger than the sum of its proper divisors (3993662).

7987318 is a wasteful number, since it uses less digits than its factorization.

7987318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993661.

The product of its digits is 84672, while the sum is 43.

The square root of 7987318 is about 2826.1843535056. The cubic root of 7987318 is about 199.8942607726.

The spelling of 7987318 in words is "seven million, nine hundred eighty-seven thousand, three hundred eighteen".