86512287 has 4 divisors (see below), whose sum is σ = 115349720. Its totient is φ = 57674856.

The previous prime is 86512277. The next prime is 86512297. The reversal of 86512287 is 78221568.

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

It is an interprime number because it is at equal distance from previous prime (86512277) and next prime (86512297).

It is a de Polignac number, because none of the positive numbers 2^k-86512287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86512247) 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, 14418712 + ... + 14418717.

It is an arithmetic number, because the mean of its divisors is an integer number (28837430).

Almost surely, 2^86512287 is an apocalyptic number.

86512287 is a deficient number, since it is larger than the sum of its proper divisors (28837433).

86512287 is a wasteful number, since it uses less digits than its factorization.

86512287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28837432.

The product of its digits is 53760, while the sum is 39.

The square root of 86512287 is about 9301.1981486258. The cubic root of 86512287 is about 442.2752102861.

The spelling of 86512287 in words is "eighty-six million, five hundred twelve thousand, two hundred eighty-seven".