86671309 has 2 divisors, whose sum is σ = 86671310. Its totient is φ = 86671308.

The previous prime is 86671283. The next prime is 86671349. The reversal of 86671309 is 90317668.

It is an a-pointer prime, because the next prime (86671349) can be obtained adding 86671309 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85562500 + 1108809 = 9250^2 + 1053^2 .

It is a cyclic number.

It is not a de Polignac number, because 86671309 - 2¹³ = 86663117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86671349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43335654 + 43335655.

It is an arithmetic number, because the mean of its divisors is an integer number (43335655).

Almost surely, 2^86671309 is an apocalyptic number.

It is an amenable number.

86671309 is a deficient number, since it is larger than the sum of its proper divisors (1).

86671309 is an equidigital number, since it uses as much as digits as its factorization.

86671309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 86671309 is about 9309.7426924701. The cubic root of 86671309 is about 442.5460328546.

The spelling of 86671309 in words is "eighty-six million, six hundred seventy-one thousand, three hundred nine".