86384639 has 8 divisors (see below), whose sum is σ = 94607568. Its totient is φ = 78223360.

The previous prime is 86384563. The next prime is 86384651. The reversal of 86384639 is 93648368.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86384639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86384593 and 86384602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86384689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12452 + ... + 18105.

It is an arithmetic number, because the mean of its divisors is an integer number (11825946).

Almost surely, 2^86384639 is an apocalyptic number.

86384639 is a deficient number, since it is larger than the sum of its proper divisors (8222929).

86384639 is a wasteful number, since it uses less digits than its factorization.

86384639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30825.

The product of its digits is 746496, while the sum is 47.

The square root of 86384639 is about 9294.3337039295. Note that the first 3 decimals coincide. The cubic root of 86384639 is about 442.0575790211.

The spelling of 86384639 in words is "eighty-six million, three hundred eighty-four thousand, six hundred thirty-nine".