86783865 has 32 divisors (see below), whose sum is σ = 159041280. Its totient is φ = 39585024.

The previous prime is 86783821. The next prime is 86783869. The reversal of 86783865 is 56838768.

It is not a de Polignac number, because 86783865 - 2¹² = 86779769 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86783869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86547 + ... + 87543.

It is an arithmetic number, because the mean of its divisors is an integer number (4970040).

Almost surely, 2^86783865 is an apocalyptic number.

It is an amenable number.

86783865 is a deficient number, since it is larger than the sum of its proper divisors (72257415).

86783865 is a wasteful number, since it uses less digits than its factorization.

86783865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841.

The product of its digits is 1935360, while the sum is 51.

The square root of 86783865 is about 9315.7857961634. The cubic root of 86783865 is about 442.7375213063.

It can be divided in two parts, 867838 and 65, that added together give a triangular number (867903 = T₁₃₁₇).

The spelling of 86783865 in words is "eighty-six million, seven hundred eighty-three thousand, eight hundred sixty-five".