86405717 has 4 divisors (see below), whose sum is σ = 87198540. Its totient is φ = 85612896.

The previous prime is 86405701. The next prime is 86405719. The reversal of 86405717 is 71750468.

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 54302161 + 32103556 = 7369^2 + 5666^2 .

It is a cyclic number.

It is not a de Polignac number, because 86405717 - 2⁴ = 86405701 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 (86405719) 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, 396248 + ... + 396465.

It is an arithmetic number, because the mean of its divisors is an integer number (21799635).

Almost surely, 2^86405717 is an apocalyptic number.

It is an amenable number.

86405717 is a deficient number, since it is larger than the sum of its proper divisors (792823).

86405717 is a wasteful number, since it uses less digits than its factorization.

86405717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792822.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 86405717 is about 9295.4675514468. The cubic root of 86405717 is about 442.0935303663.

The spelling of 86405717 in words is "eighty-six million, four hundred five thousand, seven hundred seventeen".