86628913 has 6 divisors (see below), whose sum is σ = 100772466. Its totient is φ = 74253312.

The previous prime is 86628907. The next prime is 86628917. The reversal of 86628913 is 31982668.

It can be written as a sum of positive squares in only one way, i.e., 76440049 + 10188864 = 8743^2 + 3192^2 .

It is not a de Polignac number, because 86628913 - 2⁹ = 86628401 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 86628913.

It is not an unprimeable number, because it can be changed into a prime (86628917) 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 5 ways as a sum of consecutive naturals, for example, 883920 + ... + 884017.

It is an arithmetic number, because the mean of its divisors is an integer number (16795411).

Almost surely, 2^86628913 is an apocalyptic number.

It is an amenable number.

86628913 is a deficient number, since it is larger than the sum of its proper divisors (14143553).

86628913 is a wasteful number, since it uses less digits than its factorization.

86628913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767951 (or 1767944 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 86628913 is about 9307.4654444698. The cubic root of 86628913 is about 442.4738627140.

The spelling of 86628913 in words is "eighty-six million, six hundred twenty-eight thousand, nine hundred thirteen".