86530109 has 2 divisors, whose sum is σ = 86530110. Its totient is φ = 86530108.

The previous prime is 86530069. The next prime is 86530133. The reversal of 86530109 is 90103568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60295225 + 26234884 = 7765^2 + 5122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86530109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86530139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43265054 + 43265055.

It is an arithmetic number, because the mean of its divisors is an integer number (43265055).

Almost surely, 2^86530109 is an apocalyptic number.

It is an amenable number.

86530109 is a deficient number, since it is larger than the sum of its proper divisors (1).

86530109 is an equidigital number, since it uses as much as digits as its factorization.

86530109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 86530109 is about 9302.1561479046. The cubic root of 86530109 is about 442.3055785643.

The spelling of 86530109 in words is "eighty-six million, five hundred thirty thousand, one hundred nine".