85310857 has 2 divisors, whose sum is σ = 85310858. Its totient is φ = 85310856.

The previous prime is 85310851. The next prime is 85310881. The reversal of 85310857 is 75801358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83557881 + 1752976 = 9141^2 + 1324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85310857 is a prime.

It is not a weakly prime, because it can be changed into another prime (85310851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42655428 + 42655429.

It is an arithmetic number, because the mean of its divisors is an integer number (42655429).

Almost surely, 2^85310857 is an apocalyptic number.

It is an amenable number.

85310857 is a deficient number, since it is larger than the sum of its proper divisors (1).

85310857 is an equidigital number, since it uses as much as digits as its factorization.

85310857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 85310857 is about 9236.3876596860. The cubic root of 85310857 is about 440.2183093659.

The spelling of 85310857 in words is "eighty-five million, three hundred ten thousand, eight hundred fifty-seven".