86512547 has 4 divisors (see below), whose sum is σ = 94377336. Its totient is φ = 78647760.

The previous prime is 86512523. The next prime is 86512561. The reversal of 86512547 is 74521568.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86512547 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 86512547.

It is not an unprimeable number, because it can be changed into a prime (86512247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3932378 + ... + 3932399.

It is an arithmetic number, because the mean of its divisors is an integer number (23594334).

Almost surely, 2^86512547 is an apocalyptic number.

86512547 is a deficient number, since it is larger than the sum of its proper divisors (7864789).

86512547 is a wasteful number, since it uses less digits than its factorization.

86512547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864788.

The product of its digits is 67200, while the sum is 38.

The square root of 86512547 is about 9301.2121253093. The cubic root of 86512547 is about 442.2756533501.

The spelling of 86512547 in words is "eighty-six million, five hundred twelve thousand, five hundred forty-seven".