86278813 has 4 divisors (see below), whose sum is σ = 86377408. Its totient is φ = 86180220.

The previous prime is 86278811. The next prime is 86278817. The reversal of 86278813 is 31887268.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86278813 - 2¹ = 86278811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86278813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86278811) 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, 47973 + ... + 49738.

It is an arithmetic number, because the mean of its divisors is an integer number (21594352).

Almost surely, 2^86278813 is an apocalyptic number.

It is an amenable number.

86278813 is a deficient number, since it is larger than the sum of its proper divisors (98595).

86278813 is an equidigital number, since it uses as much as digits as its factorization.

86278813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98594.

The product of its digits is 129024, while the sum is 43.

The square root of 86278813 is about 9288.6389207461. The cubic root of 86278813 is about 441.8769901954.

The spelling of 86278813 in words is "eighty-six million, two hundred seventy-eight thousand, eight hundred thirteen".