987147 has 20 divisors (see below), whose sum is σ = 1686256. Its totient is φ = 563760.

The previous prime is 987143. The next prime is 987191. The reversal of 987147 is 741789.

It is not a de Polignac number, because 987147 - 2² = 987143 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987143) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 304 + ... + 1437.

2⁹⁸⁷¹⁴⁷ is an apocalyptic number.

987147 is a deficient number, since it is larger than the sum of its proper divisors (699109).

987147 is a wasteful number, since it uses less digits than its factorization.

987147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760 (or 1751 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 987147 is about 993.5527162662. The cubic root of 987147 is about 99.5697178952.

The spelling of 987147 in words is "nine hundred eighty-seven thousand, one hundred forty-seven".