86531341909 has 2 divisors, whose sum is σ = 86531341910. Its totient is φ = 86531341908.

The previous prime is 86531341903. The next prime is 86531341913. The reversal of 86531341909 is 90914313568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86140489009 + 390852900 = 293497^2 + 19770^2 .

It is a cyclic number.

It is not a de Polignac number, because 86531341909 - 2⁵ = 86531341877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86531341903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43265670954 + 43265670955.

It is an arithmetic number, because the mean of its divisors is an integer number (43265670955).

Almost surely, 2^86531341909 is an apocalyptic number.

It is an amenable number.

86531341909 is a deficient number, since it is larger than the sum of its proper divisors (1).

86531341909 is an equidigital number, since it uses as much as digits as its factorization.

86531341909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 86531341909 in words is "eighty-six billion, five hundred thirty-one million, three hundred forty-one thousand, nine hundred nine".