87539243 has 8 divisors (see below), whose sum is σ = 96571440. Its totient is φ = 78686080.

The previous prime is 87539227. The next prime is 87539267. The reversal of 87539243 is 34293578.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87539243 - 2⁴ = 87539227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87539243.

It is not an unprimeable number, because it can be changed into a prime (87539293) 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 7 ways as a sum of consecutive naturals, for example, 43730 + ... + 45687.

It is an arithmetic number, because the mean of its divisors is an integer number (12071430).

Almost surely, 2^87539243 is an apocalyptic number.

87539243 is a deficient number, since it is larger than the sum of its proper divisors (9032197).

87539243 is a wasteful number, since it uses less digits than its factorization.

87539243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89517.

The product of its digits is 181440, while the sum is 41.

The square root of 87539243 is about 9356.2408583790. The cubic root of 87539243 is about 444.0183605074.

It can be divided in two parts, 87 and 539243, that multiplied together give a triangular number (46914141 = T₉₆₈₆).

The spelling of 87539243 in words is "eighty-seven million, five hundred thirty-nine thousand, two hundred forty-three".