85294109 has 2 divisors, whose sum is σ = 85294110. Its totient is φ = 85294108.

The previous prime is 85294091. The next prime is 85294123. The reversal of 85294109 is 90149258.

Together with previous prime (85294091) 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., 59059225 + 26234884 = 7685^2 + 5122^2 .

It is a cyclic number.

It is not a de Polignac number, because 85294109 - 2¹² = 85290013 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

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

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85294159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42647054 + 42647055.

It is an arithmetic number, because the mean of its divisors is an integer number (42647055).

Almost surely, 2^85294109 is an apocalyptic number.

It is an amenable number.

85294109 is a deficient number, since it is larger than the sum of its proper divisors (1).

85294109 is an equidigital number, since it uses as much as digits as its factorization.

85294109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 85294109 is about 9235.4809836846. The cubic root of 85294109 is about 440.1894999857.

The spelling of 85294109 in words is "eighty-five million, two hundred ninety-four thousand, one hundred nine".