85670317 has 2 divisors, whose sum is σ = 85670318. Its totient is φ = 85670316.

The previous prime is 85670309. The next prime is 85670323. The reversal of 85670317 is 71307658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67059721 + 18610596 = 8189^2 + 4314^2 .

It is a cyclic number.

It is not a de Polignac number, because 85670317 - 2³ = 85670309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85670357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42835158 + 42835159.

It is an arithmetic number, because the mean of its divisors is an integer number (42835159).

Almost surely, 2^85670317 is an apocalyptic number.

It is an amenable number.

85670317 is a deficient number, since it is larger than the sum of its proper divisors (1).

85670317 is an equidigital number, since it uses as much as digits as its factorization.

85670317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 85670317 is about 9255.8261111583. The cubic root of 85670317 is about 440.8357342630.

The spelling of 85670317 in words is "eighty-five million, six hundred seventy thousand, three hundred seventeen".