86766689 has 2 divisors, whose sum is σ = 86766690. Its totient is φ = 86766688.

The previous prime is 86766683. The next prime is 86766697. The reversal of 86766689 is 98666768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86397025 + 369664 = 9295^2 + 608^2 .

It is a cyclic number.

It is not a de Polignac number, because 86766689 - 2¹² = 86762593 is a prime.

It is not a weakly prime, because it can be changed into another prime (86766683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43383344 + 43383345.

It is an arithmetic number, because the mean of its divisors is an integer number (43383345).

Almost surely, 2^86766689 is an apocalyptic number.

It is an amenable number.

86766689 is a deficient number, since it is larger than the sum of its proper divisors (1).

86766689 is an equidigital number, since it uses as much as digits as its factorization.

86766689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 56.

The square root of 86766689 is about 9314.8638744750. The cubic root of 86766689 is about 442.7083109556.

The spelling of 86766689 in words is "eighty-six million, seven hundred sixty-six thousand, six hundred eighty-nine".