7987147 has 6 divisors (see below), whose sum is σ = 9291228. Its totient is φ = 6846084.

The previous prime is 7987139. The next prime is 7987223. The reversal of 7987147 is 7417897.

It is not a de Polignac number, because 7987147 - 2³ = 7987139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7987247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81453 + ... + 81550.

It is an arithmetic number, because the mean of its divisors is an integer number (1548538).

Almost surely, 2^7987147 is an apocalyptic number.

7987147 is a deficient number, since it is larger than the sum of its proper divisors (1304081).

7987147 is a wasteful number, since it uses less digits than its factorization.

7987147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163017 (or 163010 counting only the distinct ones).

The product of its digits is 98784, while the sum is 43.

The square root of 7987147 is about 2826.1541005402. The cubic root of 7987147 is about 199.8928342544.

The spelling of 7987147 in words is "seven million, nine hundred eighty-seven thousand, one hundred forty-seven".