85181093 has 2 divisors, whose sum is σ = 85181094. Its totient is φ = 85181092.

The previous prime is 85181081. The next prime is 85181113. The reversal of 85181093 is 39018158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82864609 + 2316484 = 9103^2 + 1522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85181093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85186093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42590546 + 42590547.

It is an arithmetic number, because the mean of its divisors is an integer number (42590547).

Almost surely, 2^85181093 is an apocalyptic number.

It is an amenable number.

85181093 is a deficient number, since it is larger than the sum of its proper divisors (1).

85181093 is an equidigital number, since it uses as much as digits as its factorization.

85181093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 85181093 is about 9229.3603787045. The cubic root of 85181093 is about 439.9949947778.

The spelling of 85181093 in words is "eighty-five million, one hundred eighty-one thousand, ninety-three".