86818969 has 4 divisors (see below), whose sum is σ = 87157044. Its totient is φ = 86480896.

The previous prime is 86818967. The next prime is 86818981. The reversal of 86818969 is 96981868.

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 86118400 + 700569 = 9280^2 + 837^2 .

It is a cyclic number.

It is not a de Polignac number, because 86818969 - 2¹ = 86818967 is a prime.

It is a super-2 number, since 2×86818969² = 15075066756445922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86818967) 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, 168652 + ... + 169165.

It is an arithmetic number, because the mean of its divisors is an integer number (21789261).

Almost surely, 2^86818969 is an apocalyptic number.

It is an amenable number.

86818969 is a deficient number, since it is larger than the sum of its proper divisors (338075).

86818969 is a wasteful number, since it uses less digits than its factorization.

86818969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338074.

The product of its digits is 1492992, while the sum is 55.

The square root of 86818969 is about 9317.6697194095. The cubic root of 86818969 is about 442.7972089102.

The spelling of 86818969 in words is "eighty-six million, eight hundred eighteen thousand, nine hundred sixty-nine".