85747289 has 16 divisors (see below), whose sum is σ = 92180352. Its totient is φ = 79567488.

The previous prime is 85747267. The next prime is 85747301. The reversal of 85747289 is 98274758.

It is not a de Polignac number, because 85747289 - 2¹² = 85743193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85747219) 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 15 ways as a sum of consecutive naturals, for example, 273797 + ... + 274109.

It is an arithmetic number, because the mean of its divisors is an integer number (5761272).

Almost surely, 2^85747289 is an apocalyptic number.

It is an amenable number.

85747289 is a deficient number, since it is larger than the sum of its proper divisors (6433063).

85747289 is a wasteful number, since it uses less digits than its factorization.

85747289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656.

The product of its digits is 1128960, while the sum is 50.

The square root of 85747289 is about 9259.9832073282. The cubic root of 85747289 is about 440.9677202769.

The spelling of 85747289 in words is "eighty-five million, seven hundred forty-seven thousand, two hundred eighty-nine".