86242109 has 2 divisors, whose sum is σ = 86242110. Its totient is φ = 86242108.

The previous prime is 86242097. The next prime is 86242151. The reversal of 86242109 is 90124268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85618009 + 624100 = 9253^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 86242109 - 2¹² = 86238013 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 (86241109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43121054 + 43121055.

It is an arithmetic number, because the mean of its divisors is an integer number (43121055).

Almost surely, 2^86242109 is an apocalyptic number.

It is an amenable number.

86242109 is a deficient number, since it is larger than the sum of its proper divisors (1).

86242109 is an equidigital number, since it uses as much as digits as its factorization.

86242109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 86242109 is about 9286.6629636269. The cubic root of 86242109 is about 441.8143214556.

The spelling of 86242109 in words is "eighty-six million, two hundred forty-two thousand, one hundred nine".