86765281 has 2 divisors, whose sum is σ = 86765282. Its totient is φ = 86765280.

The previous prime is 86765279. The next prime is 86765291. The reversal of 86765281 is 18256768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73805281 + 12960000 = 8591^2 + 3600^2 .

It is a cyclic number.

It is not a de Polignac number, because 86765281 - 2¹ = 86765279 is a prime.

It is a super-2 number, since 2×86765281² = 15056427974017922, which contains 22 as substring.

Together with 86765279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (86765291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43382640 + 43382641.

It is an arithmetic number, because the mean of its divisors is an integer number (43382641).

Almost surely, 2^86765281 is an apocalyptic number.

It is an amenable number.

86765281 is a deficient number, since it is larger than the sum of its proper divisors (1).

86765281 is an equidigital number, since it uses as much as digits as its factorization.

86765281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 86765281 is about 9314.7882960377. The cubic root of 86765281 is about 442.7059162706.

The spelling of 86765281 in words is "eighty-six million, seven hundred sixty-five thousand, two hundred eighty-one".