86219657 has 8 divisors (see below), whose sum is σ = 90003912. Its totient is φ = 82512000.

The previous prime is 86219633. The next prime is 86219669. The reversal of 86219657 is 75691268.

It can be written as a sum of positive squares in 4 ways, for example, as 5740816 + 80478841 = 2396^2 + 8971^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 86219657 - 2⁶ = 86219593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86219057) 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 7 ways as a sum of consecutive naturals, for example, 16844 + ... + 21357.

It is an arithmetic number, because the mean of its divisors is an integer number (11250489).

Almost surely, 2^86219657 is an apocalyptic number.

It is an amenable number.

86219657 is a deficient number, since it is larger than the sum of its proper divisors (3784255).

86219657 is a wasteful number, since it uses less digits than its factorization.

86219657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38299.

The product of its digits is 181440, while the sum is 44.

The square root of 86219657 is about 9285.4540545953. The cubic root of 86219657 is about 441.7759779433.

The spelling of 86219657 in words is "eighty-six million, two hundred nineteen thousand, six hundred fifty-seven".