86866813 has 8 divisors (see below), whose sum is σ = 94924800. Its totient is φ = 78835680.

The previous prime is 86866811. The next prime is 86866817. The reversal of 86866813 is 31866868.

It is a happy number.

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

It is not a de Polignac number, because 86866813 - 2¹ = 86866811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86866811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388 + ... + 13186.

It is an arithmetic number, because the mean of its divisors is an integer number (11865600).

Almost surely, 2^86866813 is an apocalyptic number.

It is an amenable number.

86866813 is a deficient number, since it is larger than the sum of its proper divisors (8057987).

86866813 is a wasteful number, since it uses less digits than its factorization.

86866813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13427.

The product of its digits is 331776, while the sum is 46.

The square root of 86866813 is about 9320.2367459201. The cubic root of 86866813 is about 442.8785325331.

Subtracting from 86866813 its reverse (31866868), we obtain a palindrome (54999945).

The spelling of 86866813 in words is "eighty-six million, eight hundred sixty-six thousand, eight hundred thirteen".