86578487 has 4 divisors (see below), whose sum is σ = 86658936. Its totient is φ = 86498040.

The previous prime is 86578469. The next prime is 86578489. The reversal of 86578487 is 78487568.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86578487 - 2⁶ = 86578423 is a prime.

It is a super-2 number, since 2×86578487² = 14991668822418338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86578489) 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, 38588 + ... + 40769.

It is an arithmetic number, because the mean of its divisors is an integer number (21664734).

Almost surely, 2^86578487 is an apocalyptic number.

86578487 is a deficient number, since it is larger than the sum of its proper divisors (80449).

86578487 is a wasteful number, since it uses less digits than its factorization.

86578487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80448.

The product of its digits is 3010560, while the sum is 53.

The square root of 86578487 is about 9304.7561494109. The cubic root of 86578487 is about 442.3879925471.

The spelling of 86578487 in words is "eighty-six million, five hundred seventy-eight thousand, four hundred eighty-seven".