86768389 has 2 divisors, whose sum is σ = 86768390. Its totient is φ = 86768388.

The previous prime is 86768359. The next prime is 86768399. The reversal of 86768389 is 98386768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51365889 + 35402500 = 7167^2 + 5950^2 .

It is a cyclic number.

It is not a de Polignac number, because 86768389 - 2²³ = 78379781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86768309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43384194 + 43384195.

It is an arithmetic number, because the mean of its divisors is an integer number (43384195).

Almost surely, 2^86768389 is an apocalyptic number.

It is an amenable number.

86768389 is a deficient number, since it is larger than the sum of its proper divisors (1).

86768389 is an equidigital number, since it uses as much as digits as its factorization.

86768389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 55.

The square root of 86768389 is about 9314.9551260325. The cubic root of 86768389 is about 442.7112022311.

The spelling of 86768389 in words is "eighty-six million, seven hundred sixty-eight thousand, three hundred eighty-nine".