86405539 has 8 divisors (see below), whose sum is σ = 95454720. Its totient is φ = 77555400.

The previous prime is 86405531. The next prime is 86405581. The reversal of 86405539 is 93550468.

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 86405539 - 2³ = 86405531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86405531) 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, 48847 + ... + 50584.

It is an arithmetic number, because the mean of its divisors is an integer number (11931840).

Almost surely, 2^86405539 is an apocalyptic number.

86405539 is a deficient number, since it is larger than the sum of its proper divisors (9049181).

86405539 is a wasteful number, since it uses less digits than its factorization.

86405539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99521.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 86405539 is about 9295.4579768831. The cubic root of 86405539 is about 442.0932267880.

Subtracting 86405539 from its reverse (93550468), we obtain a square (7144929 = 2673²).

The spelling of 86405539 in words is "eighty-six million, four hundred five thousand, five hundred thirty-nine".