86768081 has 2 divisors, whose sum is σ = 86768082. Its totient is φ = 86768080.

The previous prime is 86768057. The next prime is 86768089. The reversal of 86768081 is 18086768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77281681 + 9486400 = 8791^2 + 3080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86768081 is a prime.

It is a super-2 number, since 2×86768081² = 15057399760845122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86768089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43384040 + 43384041.

It is an arithmetic number, because the mean of its divisors is an integer number (43384041).

Almost surely, 2^86768081 is an apocalyptic number.

It is an amenable number.

86768081 is a deficient number, since it is larger than the sum of its proper divisors (1).

86768081 is an equidigital number, since it uses as much as digits as its factorization.

86768081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 86768081 is about 9314.9385934637. The cubic root of 86768081 is about 442.7106784028.

The spelling of 86768081 in words is "eighty-six million, seven hundred sixty-eight thousand, eighty-one".