86512005 has 24 divisors (see below), whose sum is σ = 151646040. Its totient is φ = 45619200.

The previous prime is 86512003. The next prime is 86512061. The reversal of 86512005 is 50021568.

86512005 is a `hidden beast` number, since 8 + 651 + 2 + 0 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12173121 + 74338884 = 3489^2 + 8622^2 .

It is not a de Polignac number, because 86512005 - 2¹ = 86512003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86512005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86512003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6796 + ... + 14805.

It is an arithmetic number, because the mean of its divisors is an integer number (6318585).

Almost surely, 2^86512005 is an apocalyptic number.

It is an amenable number.

86512005 is a deficient number, since it is larger than the sum of its proper divisors (65134035).

86512005 is a wasteful number, since it uses less digits than its factorization.

86512005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21701 (or 21698 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 86512005 is about 9301.1829892761. The cubic root of 86512005 is about 442.2747297310.

The spelling of 86512005 in words is "eighty-six million, five hundred twelve thousand, five".