86781677 has 2 divisors, whose sum is σ = 86781678. Its totient is φ = 86781676.

The previous prime is 86781671. The next prime is 86781701. The reversal of 86781677 is 77618768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79103236 + 7678441 = 8894^2 + 2771^2 .

It is a cyclic number.

It is not a de Polignac number, because 86781677 - 2¹⁰ = 86780653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86781671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43390838 + 43390839.

It is an arithmetic number, because the mean of its divisors is an integer number (43390839).

Almost surely, 2^86781677 is an apocalyptic number.

It is an amenable number.

86781677 is a deficient number, since it is larger than the sum of its proper divisors (1).

86781677 is an equidigital number, since it uses as much as digits as its factorization.

86781677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 50.

The square root of 86781677 is about 9315.6683603486. The cubic root of 86781677 is about 442.7338005001.

The spelling of 86781677 in words is "eighty-six million, seven hundred eighty-one thousand, six hundred seventy-seven".