86557409 has 8 divisors (see below), whose sum is σ = 90456960. Its totient is φ = 82743696.

The previous prime is 86557399. The next prime is 86557411. The reversal of 86557409 is 90475568.

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

It is not a de Polignac number, because 86557409 - 2⁸ = 86557153 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 86557409.

It is not an unprimeable number, because it can be changed into a prime (86554409) 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 7 ways as a sum of consecutive naturals, for example, 19394 + ... + 23435.

It is an arithmetic number, because the mean of its divisors is an integer number (11307120).

Almost surely, 2^86557409 is an apocalyptic number.

It is an amenable number.

86557409 is a deficient number, since it is larger than the sum of its proper divisors (3899551).

86557409 is a wasteful number, since it uses less digits than its factorization.

86557409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42919.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 86557409 is about 9303.6234339100. The cubic root of 86557409 is about 442.3520890517.

The spelling of 86557409 in words is "eighty-six million, five hundred fifty-seven thousand, four hundred nine".