87684549 has 16 divisors (see below), whose sum is σ = 118809600. Its totient is φ = 57513456.

The previous prime is 87684539. The next prime is 87684551. The reversal of 87684549 is 94548678.

It is not a de Polignac number, because 87684549 - 2⁵ = 87684517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87684529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98862 + ... + 99744.

It is an arithmetic number, because the mean of its divisors is an integer number (7425600).

Almost surely, 2^87684549 is an apocalyptic number.

It is an amenable number.

87684549 is a deficient number, since it is larger than the sum of its proper divisors (31125051).

87684549 is a wasteful number, since it uses less digits than its factorization.

87684549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384.

The product of its digits is 1935360, while the sum is 51.

The square root of 87684549 is about 9364.0028299868. The cubic root of 87684549 is about 444.2638994016.

The spelling of 87684549 in words is "eighty-seven million, six hundred eighty-four thousand, five hundred forty-nine".