87766543 has 4 divisors (see below), whose sum is σ = 87921360. Its totient is φ = 87611728.

The previous prime is 87766541. The next prime is 87766573. The reversal of 87766543 is 34566778.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87766543 - 2¹ = 87766541 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 87766493 and 87766502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87766541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76555 + ... + 77692.

It is an arithmetic number, because the mean of its divisors is an integer number (21980340).

Almost surely, 2^87766543 is an apocalyptic number.

87766543 is a deficient number, since it is larger than the sum of its proper divisors (154817).

87766543 is a wasteful number, since it uses less digits than its factorization.

87766543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154816.

The product of its digits is 846720, while the sum is 46.

The square root of 87766543 is about 9368.3799560009. The cubic root of 87766543 is about 444.4023336189.

The spelling of 87766543 in words is "eighty-seven million, seven hundred sixty-six thousand, five hundred forty-three".