86668369 has 2 divisors, whose sum is σ = 86668370. Its totient is φ = 86668368.

The previous prime is 86668357. The next prime is 86668391. The reversal of 86668369 is 96386668.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81216144 + 5452225 = 9012^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 86668369 - 2⁹ = 86667857 is a prime.

It is a super-2 number, since 2×86668369² = 15022812370240322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86668069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43334184 + 43334185.

It is an arithmetic number, because the mean of its divisors is an integer number (43334185).

Almost surely, 2^86668369 is an apocalyptic number.

It is an amenable number.

86668369 is a deficient number, since it is larger than the sum of its proper divisors (1).

86668369 is an equidigital number, since it uses as much as digits as its factorization.

86668369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 52.

The square root of 86668369 is about 9309.5847920302. The cubic root of 86668369 is about 442.5410288917.

The spelling of 86668369 in words is "eighty-six million, six hundred sixty-eight thousand, three hundred sixty-nine".