86856869 has 8 divisors (see below), whose sum is σ = 95692320. Its totient is φ = 78178000.

The previous prime is 86856853. The next prime is 86856881. The reversal of 86856869 is 96865868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86856869 - 2⁴ = 86856853 is a prime.

It is a super-2 number, since 2×86856869² = 15088231384966322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86856829) 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 7 ways as a sum of consecutive naturals, for example, 37979 + ... + 40200.

It is an arithmetic number, because the mean of its divisors is an integer number (11961540).

Almost surely, 2^86856869 is an apocalyptic number.

It is an amenable number.

86856869 is a deficient number, since it is larger than the sum of its proper divisors (8835451).

86856869 is a wasteful number, since it uses less digits than its factorization.

86856869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78291.

The product of its digits is 4976640, while the sum is 56.

The square root of 86856869 is about 9319.7032678085. The cubic root of 86856869 is about 442.8616325148.

The spelling of 86856869 in words is "eighty-six million, eight hundred fifty-six thousand, eight hundred sixty-nine".