85795909 has 2 divisors, whose sum is σ = 85795910. Its totient is φ = 85795908.

The previous prime is 85795907. The next prime is 85795921. The reversal of 85795909 is 90959758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76615009 + 9180900 = 8753^2 + 3030^2 .

It is a cyclic number.

It is not a de Polignac number, because 85795909 - 2¹ = 85795907 is a prime.

It is a super-2 number, since 2×85795909² = 14721876002272562, which contains 22 as substring.

Together with 85795907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85795907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42897954 + 42897955.

It is an arithmetic number, because the mean of its divisors is an integer number (42897955).

Almost surely, 2^85795909 is an apocalyptic number.

It is an amenable number.

85795909 is a deficient number, since it is larger than the sum of its proper divisors (1).

85795909 is an equidigital number, since it uses as much as digits as its factorization.

85795909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 52.

The square root of 85795909 is about 9262.6081100303. The cubic root of 85795909 is about 441.0510496347.

The spelling of 85795909 in words is "eighty-five million, seven hundred ninety-five thousand, nine hundred nine".