86449109 has 2 divisors, whose sum is σ = 86449110. Its totient is φ = 86449108.

The previous prime is 86449093. The next prime is 86449123. The reversal of 86449109 is 90194468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63648484 + 22800625 = 7978^2 + 4775^2 .

It is a cyclic number.

It is not a de Polignac number, because 86449109 - 2⁴ = 86449093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86449159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43224554 + 43224555.

It is an arithmetic number, because the mean of its divisors is an integer number (43224555).

Almost surely, 2^86449109 is an apocalyptic number.

It is an amenable number.

86449109 is a deficient number, since it is larger than the sum of its proper divisors (1).

86449109 is an equidigital number, since it uses as much as digits as its factorization.

86449109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 86449109 is about 9297.8012992320. The cubic root of 86449109 is about 442.1675228165.

The spelling of 86449109 in words is "eighty-six million, four hundred forty-nine thousand, one hundred nine".