987634543 has 20 divisors (see below), whose sum is σ = 1156028720. Its totient is φ = 843714144.

The previous prime is 987634541. The next prime is 987634597. The reversal of 987634543 is 345436789.

It is not a de Polignac number, because 987634543 - 2¹ = 987634541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987634541) 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, 1053571 + ... + 1054507.

It is an arithmetic number, because the mean of its divisors is an integer number (57801436).

Almost surely, 2^987634543 is an apocalyptic number.

987634543 is a deficient number, since it is larger than the sum of its proper divisors (168394177).

987634543 is an frugal number, since it uses more digits than its factorization.

987634543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1383 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 49.

The square root of 987634543 is about 31426.6533853034. The cubic root of 987634543 is about 995.8610739252.

The spelling of 987634543 in words is "nine hundred eighty-seven million, six hundred thirty-four thousand, five hundred forty-three".