85385857 has 4 divisors (see below), whose sum is σ = 85743360. Its totient is φ = 85028356.

The previous prime is 85385801. The next prime is 85385891. The reversal of 85385857 is 75858358.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75858358 = 2 ⋅37929179.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85385857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85385857.

It is not an unprimeable number, because it can be changed into a prime (85385257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178393 + ... + 178870.

It is an arithmetic number, because the mean of its divisors is an integer number (21435840).

Almost surely, 2^85385857 is an apocalyptic number.

It is an amenable number.

85385857 is a deficient number, since it is larger than the sum of its proper divisors (357503).

85385857 is a wasteful number, since it uses less digits than its factorization.

85385857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357502.

The product of its digits is 1344000, while the sum is 49.

The square root of 85385857 is about 9240.4467965570. The cubic root of 85385857 is about 440.3472757671.

The spelling of 85385857 in words is "eighty-five million, three hundred eighty-five thousand, eight hundred fifty-seven".