86428213 has 4 divisors (see below), whose sum is σ = 88058988. Its totient is φ = 84797440.

The previous prime is 86428211. The next prime is 86428219. The reversal of 86428213 is 31282468.

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 69105969 + 17322244 = 8313^2 + 4162^2 .

It is a cyclic number.

It is not a de Polignac number, because 86428213 - 2¹ = 86428211 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 (86428211) 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, 815308 + ... + 815413.

It is an arithmetic number, because the mean of its divisors is an integer number (22014747).

Almost surely, 2^86428213 is an apocalyptic number.

It is an amenable number.

86428213 is a deficient number, since it is larger than the sum of its proper divisors (1630775).

86428213 is a wasteful number, since it uses less digits than its factorization.

86428213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630774.

The product of its digits is 18432, while the sum is 34.

The square root of 86428213 is about 9296.6775247935. The cubic root of 86428213 is about 442.1318938505.

The spelling of 86428213 in words is "eighty-six million, four hundred twenty-eight thousand, two hundred thirteen".