86678213 has 4 divisors (see below), whose sum is σ = 86700780. Its totient is φ = 86655648.

The previous prime is 86678203. The next prime is 86678219. The reversal of 86678213 is 31287668.

It is a happy number.

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 54789604 + 31888609 = 7402^2 + 5647^2 .

It is a cyclic number.

It is not a de Polignac number, because 86678213 - 2⁸ = 86677957 is a prime.

It is a super-2 number, since 2×86678213² = 15026225217746738, 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 (86678219) 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, 3920 + ... + 13737.

It is an arithmetic number, because the mean of its divisors is an integer number (21675195).

Almost surely, 2^86678213 is an apocalyptic number.

It is an amenable number.

86678213 is a deficient number, since it is larger than the sum of its proper divisors (22567).

86678213 is a wasteful number, since it uses less digits than its factorization.

86678213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22566.

The product of its digits is 96768, while the sum is 41.

The square root of 86678213 is about 9310.1134794373. The cubic root of 86678213 is about 442.5577832124.

The spelling of 86678213 in words is "eighty-six million, six hundred seventy-eight thousand, two hundred thirteen".