85109023 has 2 divisors, whose sum is σ = 85109024. Its totient is φ = 85109022.

The previous prime is 85108973. The next prime is 85109029. The reversal of 85109023 is 32090158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85109023 - 2¹³ = 85100831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85108982 and 85109000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85109029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42554511 + 42554512.

It is an arithmetic number, because the mean of its divisors is an integer number (42554512).

Almost surely, 2^85109023 is an apocalyptic number.

85109023 is a deficient number, since it is larger than the sum of its proper divisors (1).

85109023 is an equidigital number, since it uses as much as digits as its factorization.

85109023 is an odious number, because the sum of its binary digits is odd.

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

The square root of 85109023 is about 9225.4551649228. The cubic root of 85109023 is about 439.8708694758.

The spelling of 85109023 in words is "eighty-five million, one hundred nine thousand, twenty-three".