86438839 has 4 divisors (see below), whose sum is σ = 86519160. Its totient is φ = 86358520.

The previous prime is 86438837. The next prime is 86438843. The reversal of 86438839 is 93883468.

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 86438839 - 2¹ = 86438837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86438792 and 86438801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86438831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38524 + ... + 40705.

It is an arithmetic number, because the mean of its divisors is an integer number (21629790).

Almost surely, 2^86438839 is an apocalyptic number.

86438839 is a deficient number, since it is larger than the sum of its proper divisors (80321).

86438839 is a wasteful number, since it uses less digits than its factorization.

86438839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80320.

The product of its digits is 995328, while the sum is 49.

The square root of 86438839 is about 9297.2490017209. The cubic root of 86438839 is about 442.1500125520.

The spelling of 86438839 in words is "eighty-six million, four hundred thirty-eight thousand, eight hundred thirty-nine".