85545857 has 4 divisors (see below), whose sum is σ = 85824816. Its totient is φ = 85266900.

The previous prime is 85545839. The next prime is 85545881. The reversal of 85545857 is 75854558.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 85545857 - 2²² = 81351553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85545827) 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, 139019 + ... + 139632.

It is an arithmetic number, because the mean of its divisors is an integer number (21456204).

Almost surely, 2^85545857 is an apocalyptic number.

It is an amenable number.

85545857 is a deficient number, since it is larger than the sum of its proper divisors (278959).

85545857 is a wasteful number, since it uses less digits than its factorization.

85545857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278958.

The product of its digits is 1120000, while the sum is 47.

The square root of 85545857 is about 9249.1003346271. The cubic root of 85545857 is about 440.6221518988.

The spelling of 85545857 in words is "eighty-five million, five hundred forty-five thousand, eight hundred fifty-seven".