86782939 has 4 divisors (see below), whose sum is σ = 86892624. Its totient is φ = 86673256.

The previous prime is 86782907. The next prime is 86782961. The reversal of 86782939 is 93928768.

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 86782939 - 2⁵ = 86782907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86782439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53647 + ... + 55240.

It is an arithmetic number, because the mean of its divisors is an integer number (21723156).

Almost surely, 2^86782939 is an apocalyptic number.

86782939 is a deficient number, since it is larger than the sum of its proper divisors (109685).

86782939 is a wasteful number, since it uses less digits than its factorization.

86782939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109684.

The product of its digits is 1306368, while the sum is 52.

The square root of 86782939 is about 9315.7360954462. The cubic root of 86782939 is about 442.7359466035.

The spelling of 86782939 in words is "eighty-six million, seven hundred eighty-two thousand, nine hundred thirty-nine".