86664847 has 4 divisors (see below), whose sum is σ = 89653320. Its totient is φ = 83676376.

The previous prime is 86664839. The next prime is 86664859. The reversal of 86664847 is 74846668.

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 86664847 - 2³ = 86664839 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 86664847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86664887) 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, 1494193 + ... + 1494250.

It is an arithmetic number, because the mean of its divisors is an integer number (22413330).

Almost surely, 2^86664847 is an apocalyptic number.

86664847 is a deficient number, since it is larger than the sum of its proper divisors (2988473).

86664847 is a wasteful number, since it uses less digits than its factorization.

86664847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988472.

The product of its digits is 1548288, while the sum is 49.

The square root of 86664847 is about 9309.3956302222. The cubic root of 86664847 is about 442.5350341994.

The spelling of 86664847 in words is "eighty-six million, six hundred sixty-four thousand, eight hundred forty-seven".