86686769 has 4 divisors (see below), whose sum is σ = 93354996. Its totient is φ = 80018544.

The previous prime is 86686763. The next prime is 86686781. The reversal of 86686769 is 96768668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7263025 + 79423744 = 2695^2 + 8912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86686769 is a prime.

It is a super-2 number, since 2×86686769² = 15029191839318722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86686763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3334094 + ... + 3334119.

It is an arithmetic number, because the mean of its divisors is an integer number (23338749).

Almost surely, 2^86686769 is an apocalyptic number.

It is an amenable number.

86686769 is a deficient number, since it is larger than the sum of its proper divisors (6668227).

86686769 is a wasteful number, since it uses less digits than its factorization.

86686769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668226.

The product of its digits is 5225472, while the sum is 56.

The square root of 86686769 is about 9310.5729684053. The cubic root of 86686769 is about 442.5723443487.

The spelling of 86686769 in words is "eighty-six million, six hundred eighty-six thousand, seven hundred sixty-nine".