85657287 has 4 divisors (see below), whose sum is σ = 114209720. Its totient is φ = 57104856.

The previous prime is 85657283. The next prime is 85657291. The reversal of 85657287 is 78275658.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (85657283) and next prime (85657291).

It is not a de Polignac number, because 85657287 - 2² = 85657283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85657283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14276212 + ... + 14276217.

It is an arithmetic number, because the mean of its divisors is an integer number (28552430).

Almost surely, 2^85657287 is an apocalyptic number.

85657287 is a deficient number, since it is larger than the sum of its proper divisors (28552433).

85657287 is a wasteful number, since it uses less digits than its factorization.

85657287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28552432.

The product of its digits is 940800, while the sum is 48.

The square root of 85657287 is about 9255.1222034071. The cubic root of 85657287 is about 440.8133835389.

The spelling of 85657287 in words is "eighty-five million, six hundred fifty-seven thousand, two hundred eighty-seven".