85608857 has 2 divisors, whose sum is σ = 85608858. Its totient is φ = 85608856.

The previous prime is 85608839. The next prime is 85608869. The reversal of 85608857 is 75880658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84566416 + 1042441 = 9196^2 + 1021^2 .

It is a cyclic number.

It is not a de Polignac number, because 85608857 - 2¹⁶ = 85543321 is a prime.

It is not a weakly prime, because it can be changed into another prime (85608157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42804428 + 42804429.

It is an arithmetic number, because the mean of its divisors is an integer number (42804429).

Almost surely, 2^85608857 is an apocalyptic number.

It is an amenable number.

85608857 is a deficient number, since it is larger than the sum of its proper divisors (1).

85608857 is an equidigital number, since it uses as much as digits as its factorization.

85608857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 537600, while the sum is 47.

The square root of 85608857 is about 9252.5054444729. The cubic root of 85608857 is about 440.7302903287.

The spelling of 85608857 in words is "eighty-five million, six hundred eight thousand, eight hundred fifty-seven".