85230109 has 2 divisors, whose sum is σ = 85230110. Its totient is φ = 85230108.

The previous prime is 85230091. The next prime is 85230113. The reversal of 85230109 is 90103258.

Together with previous prime (85230091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83667609 + 1562500 = 9147^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 85230109 - 2⁵ = 85230077 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85230169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42615054 + 42615055.

It is an arithmetic number, because the mean of its divisors is an integer number (42615055).

Almost surely, 2^85230109 is an apocalyptic number.

It is an amenable number.

85230109 is a deficient number, since it is larger than the sum of its proper divisors (1).

85230109 is an equidigital number, since it uses as much as digits as its factorization.

85230109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 85230109 is about 9232.0154354290. The cubic root of 85230109 is about 440.0793744544.

The spelling of 85230109 in words is "eighty-five million, two hundred thirty thousand, one hundred nine".