87656543 has 8 divisors (see below), whose sum is σ = 95144448. Its totient is φ = 80275104.

The previous prime is 87656537. The next prime is 87656563. The reversal of 87656543 is 34565678.

87656543 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is not a de Polignac number, because 87656543 - 2²⁰ = 86607967 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87656494 and 87656503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87656533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24896 + ... + 28197.

It is an arithmetic number, because the mean of its divisors is an integer number (11893056).

Almost surely, 2^87656543 is an apocalyptic number.

87656543 is a deficient number, since it is larger than the sum of its proper divisors (7487905).

87656543 is a wasteful number, since it uses less digits than its factorization.

87656543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53233.

The product of its digits is 604800, while the sum is 44.

The square root of 87656543 is about 9362.5073030679. The cubic root of 87656543 is about 444.2165958200.

Adding to 87656543 its reverse (34565678), we get a palindrome (122222221).

The spelling of 87656543 in words is "eighty-seven million, six hundred fifty-six thousand, five hundred forty-three".