87516549 has 6 divisors (see below), whose sum is σ = 126412806. Its totient is φ = 58344360.

The previous prime is 87516547. The next prime is 87516557. The reversal of 87516549 is 94561578.

87516549 is a `hidden beast` number, since 87 + 516 + 54 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59954049 + 27562500 = 7743^2 + 5250^2 .

It is not a de Polignac number, because 87516549 - 2¹ = 87516547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87516547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4862022 + ... + 4862039.

It is an arithmetic number, because the mean of its divisors is an integer number (21068801).

Almost surely, 2^87516549 is an apocalyptic number.

It is an amenable number.

87516549 is a deficient number, since it is larger than the sum of its proper divisors (38896257).

87516549 is a wasteful number, since it uses less digits than its factorization.

87516549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9724067 (or 9724064 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 87516549 is about 9355.0280063718. The cubic root of 87516549 is about 443.9799875324.

It can be divided in two parts, 875 and 16549, that added together give a square (17424 = 132²).

The spelling of 87516549 in words is "eighty-seven million, five hundred sixteen thousand, five hundred forty-nine".