85097317 has 2 divisors, whose sum is σ = 85097318. Its totient is φ = 85097316.

The previous prime is 85097231. The next prime is 85097321. The reversal of 85097317 is 71379058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68459076 + 16638241 = 8274^2 + 4079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85097317 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85097317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85097917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42548658 + 42548659.

It is an arithmetic number, because the mean of its divisors is an integer number (42548659).

Almost surely, 2^85097317 is an apocalyptic number.

It is an amenable number.

85097317 is a deficient number, since it is larger than the sum of its proper divisors (1).

85097317 is an equidigital number, since it uses as much as digits as its factorization.

85097317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 85097317 is about 9224.8207028646. The cubic root of 85097317 is about 439.8507017572.

The spelling of 85097317 in words is "eighty-five million, ninety-seven thousand, three hundred seventeen".