86530909 has 2 divisors, whose sum is σ = 86530910. Its totient is φ = 86530908.

The previous prime is 86530907. The next prime is 86530933. The reversal of 86530909 is 90903568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84235684 + 2295225 = 9178^2 + 1515^2 .

It is a cyclic number.

It is not a de Polignac number, because 86530909 - 2¹ = 86530907 is a prime.

Together with 86530907, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86530907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43265454 + 43265455.

It is an arithmetic number, because the mean of its divisors is an integer number (43265455).

Almost surely, 2^86530909 is an apocalyptic number.

It is an amenable number.

86530909 is a deficient number, since it is larger than the sum of its proper divisors (1).

86530909 is an equidigital number, since it uses as much as digits as its factorization.

86530909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 86530909 is about 9302.1991485885. The cubic root of 86530909 is about 442.3069416481.

The spelling of 86530909 in words is "eighty-six million, five hundred thirty thousand, nine hundred nine".