85634917 has 2 divisors, whose sum is σ = 85634918. Its totient is φ = 85634916.

The previous prime is 85634897. The next prime is 85634929. The reversal of 85634917 is 71943658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64096036 + 21538881 = 8006^2 + 4641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85634917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85634977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42817458 + 42817459.

It is an arithmetic number, because the mean of its divisors is an integer number (42817459).

Almost surely, 2^85634917 is an apocalyptic number.

It is an amenable number.

85634917 is a deficient number, since it is larger than the sum of its proper divisors (1).

85634917 is an equidigital number, since it uses as much as digits as its factorization.

85634917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 85634917 is about 9253.9136045243. The cubic root of 85634917 is about 440.7750063645.

The spelling of 85634917 in words is "eighty-five million, six hundred thirty-four thousand, nine hundred seventeen".